3420 TOEIC Vocabulary Words

sed; imposed; imposing 
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impossible 
adj. unbearable; cannot be done; cannot be endured 
impress 
v. to affect strongly; to emphasize; to stamp 
Forms: impressed; impressed; impressing 
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impression 
n. strong feeling or idea left by an experience; effect; 
vague memory 
impressive 
adj. grand; magnificent; striking 
Forms: plural: impressions 
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I 3420 TOEIC Vocabulary Words 
improve 
v. to make better; to increase in quality; to enhance; to 
develop 
improvement 
n. something which enhances or improves; addition or 
change which adds value to something 
Forms: improved; improved; improving Forms: plural: improvements 
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impulse 
n. instinctual urge; sudden desire; whim; wave of energy 
sent via a nerve 
inalienable 
adj. non-transferable 
Forms: plural: impulses 
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inanimate 
adj. lifeless; spiritless 
inbound 
adj. traveling in an inward direction 
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incentive 
adj. provocative; stimulating; encouraging 
incentive 
n. stimulus; inducement; enticement; encouragement 
Forms: plural: incentives 
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incinerator 
n. furnace which burns things to ashes 
incline 
v. to slope; to bend; to bow; to slant; to influence 
Forms: plural: incinerators Forms: inclined; inclined; inclining 
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incline 
n. slope; grade; slant 
include 
v. to comprise; to contain; to embrace 
Forms: plural: inclines Forms: included; included; including 
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including 
adj. comprising; containing; embracing 
inclusive 
adj. containing; comprehensive; all-embracing; extensive; 
taking in 
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income 
n. amount of money received in payment for goods or 
services or from other sources; revenue; profits 
inconvenience 
v. to cause discomfort; to trouble; to put out; to disturb 
Forms: plural: incomes Forms: inconvenienced; inconvenienced; 
inconveniencing 
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I 3420 TOEIC Vocabulary Words 
inconvenience 
n. bother; disturbance; nuisance; discomfort 
incorrect 
adj. wrong; erroneous; imprecise; unseemly; improper 
Forms: plural: inconveniences 
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increase 
v. to enlarge; to add to; to multiply; to raise; to intensify 
increase 
n. growth; expansion; addition; enlargement; escalation 
Forms: increased; increased; increasing Forms: plural: increases 
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incredible 
adj. unbelievable; inconceivable; fabulous; great; 
amazing 
incumbent 
adj. presently holding an office or position; compulsory; 
necessary; resting; lying 
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incumbent 
n. person who currently holds an office or position 
incur 
v. to meet with; to bring upon oneself; to acquire 
Forms: plural: incumbents Forms: incurred; incurred; incurring 
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independent 
adj. free; autonomous; sovereign; self-reliant; self- 
sufficient 
independent 
n. person who does not belong to any political party 
Forms: plural: independents 
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index 
v. to register; to adjust prices or salaries in accordance 
with changes in economic indicators 
index 
n. list of subjects or other information arranged in 
alphabetical order; indicator; sign 
Forms: indexed; indexed; indexing Forms: plural: indexes 
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indicate 
v. to show; to point out; to mark; to signify; to imply; to 
exhibit 
indoor 
adj. occurring within a building; meant to be used inside 
Forms: indicated; indicated; indicating 
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induce 
v. to cause; to bring about; to set in motion; to influence 
indulge 
v. to give in to desire; to yield to; to satisfy; to spoil; to 
humor 
Forms: induced; induced; inducing Forms: indulged; indulged; indulging 
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I 3420 TOEIC Vocabulary Words 
indulgence 
n. act of giving in to desire; something which gratifies; 
luxury; leniency 
industrialize 
v. to innovate and develop production 
Forms: plural: indulgences Forms: industrialized; industrialized; industrializing 
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industry 
n. manufacturing; trade; diligence; perseverance; 
tendency to work hard 
infancy 
n. beginning phase of a project; babyhood 
Forms: plural: industries Forms: plural: infancies 
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infant 
adj. pertaining to a minor 
infant 
n. baby; very young child; toddler; tot; minor 
Forms: plural: infants 
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infer 
v. to derive; to conclude; to guess; to surmise; to hint 
inference 
n. act of deriving; speculation; drawing of a conclusion 
Forms: inferred; inferred; inferring Forms: plural: inferences 
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inflation 
n. increase in the supply of money in relation to the 
amount of goods available resulting in a rise in prices 
inflict 
v. to impose; to cause something unpleasant 
Forms: plural: inflations Forms: inflicted; inflicted; inflicting 
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influence 
n. effect; impact; person or thing which has power to 
affect others 
influence 
v. to affect; to impact; to impel; to control 
Forms: plural: influences Forms: influenced; influenced; influencing 
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influx 
n. inflow; inward flow; place where a stream flows into 
another body of water 
inform 
v. to communicate data to; to tell; to brief; to notify 
Forms: plural: influxes Forms: informed; informed; informing 
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informal 
adj. unofficial; relaxed; casual; easy; laid-back 
information 
n. knowledge; intelligence; data 
Forms: no plural 
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I 3420 TOEIC Vocabulary Words 
ingredient inhabit 
n. component; element; factor; one of the substances 
which comprises a mixture 
v. to occupy; to live in; to dwell in; to reside in; to populate 
Forms: plural: ingredients Forms: inhabited; inhabited; inhabiting 
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inhabitant 
n. person who lives in a particular place; resident; tenant; 
occupant 
inherent 
adj. intrinsic; existing as a natural and integral part; 
natural; inborn 
Forms: plural: inhabitants 
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initial 
n. beginning letter of a person's first name; first letter (as 
of a word) 
initial 
v. to sign using the first letter or letters of a name 
Forms: plural: initials Forms: initialed; initialed; initialing 
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initialed 
adj. signed with initials; marked with the first letter or 
letter of a name 
initially 
adv. at first; in the first place; at the beginning 
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initiate 
v. to set going; to launch; to begin; to start 
initiative 
adj. beginning; introductory 
Forms: initiated; initiated; initiating 
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initiative 
n. enterprise; drive; ambition; beginning move in a 
process; first step 
injure 
v. to hurt; to wound; to insult; to offend; to damage 
Forms: plural: initiatives Forms: injured; injured; injuring 
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injured 
adj. hurt; wounded; insulted; offended; damaged 
injury 
n. hurt; wound; harm; damage; insult 
Forms: plural: injuries 
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innocent 
adj. not guilty; pure; simple; naive; unsophisticated; 
harmless 
innocent 
n. person who is free from sin or wrongdoing 
Forms: plural: innocents 
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I 3420 TOEIC Vocabulary Words 
innovate innovation 
v. to make changes; to create something new; to invent n. introduction of something new; change; new method or 
practice 
Forms: innovated; innovated; innovating Forms: plural: innovations 
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innovator 
n. person who makes changes; person who introduces 
new methods or procedures; creative person 
inquiry 
n. formal question; exploration; questioning; investigation 
Forms: plural: innovators Forms: plural: inquiries 
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insert 
v. to place in; to put in; to add to 
insert 
n. something created separately for the purpose of being 
added to or placed inside (a book, newspaper, etc.) 
Forms: inserted; inserted; inserting Forms: plural: inserts 
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insist 
v. to demand; to emphasize firmly; to request firmly; to 
require; to persevere 
inspect 
v. to check; to look over carefully and critically; to 
examine officially; to review 
Forms: insisted; insisted; insisting Forms: inspected; inspect; inspecting 
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inspection 
n. act of looking over carefully and critically; official 
examination; audit; review 
inspector 
n. person whose job it is to supervise and examine; 
police officer ranking below a superintendent 
Forms: plural: inspections Forms: plural: inspectors 
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inspiration 
n. stimulus; motivation; revelation; insight; idea 
inspire 
v. to motivate; to stimulate; to provoke; to influence; to 
encourage 
Forms: plural: inspiration Forms: inspired; inspired; inspiring 
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inspiring 
adj. motivating; stimulating; encouraging; provoking; 
inhaling 
install 
v. to set up for use; to put in (i.e. machinery); to establish 
in an office or position 
Forms: installed; installed; installing 
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I 3420 TOEIC Vocabulary Words 
instalment 
n. one of several separate payments into which a debt 
has been divided 
instance 
v. to refer to a case or occurrence to explain or prove a 
point; to cite; to mention 
Forms: plural: instalments Forms: instanced; instanced; instancing 
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instance 
n. occurrence; occasion; example; illustration 
instant 
adj. immediate; quick; urgent; pressing; present; current 
Forms: plural: instances 
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instant 
n. moment; very short space of time; current month 
instantaneously 
adv. immediately; momentarily 
Forms: plural: instants 
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instead 
adv. in place of; as a replacement 
instinctively 
adv. naturally; spontaneously; intuitively; automatically 
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institute 
v. to establish; to set up; to begin; to initiate; to start 
institute 
n. foundation; organization which provides a certain 
service or supports a particular cause 
Forms: instituted; instituted; instituting Forms: plural: institutes 
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institution 
n. organization; custom; convention; law or activity which 
is accepted in a society 
instruct 
v. to inform; to direct; to guide; to command; to order; to 
educate 
Forms: plural: institutions Forms: instructed; instructed; instructing 
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instruction 
n. teaching; direction; guidance; training; education; 
information 
instructor 
n. educator; teacher; trainer 
Forms: plural: instructions Forms: plural: instructors 
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instrument 
v. to equip with devices for measuring, recording, or 
controlling 
instrument 
n. tool; implement; device; appliance; agent; means 
Forms: instrumented; instrumented; instrumenting Forms: plural: instruments 
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I 3420 TOEIC Vocabulary Words 
insulate 
v. to separate from others; to segregate 
insult 
n. affront; offense; rude remark or action 
Forms: insulated; insulated; insulating Forms: plural: insults 
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insult 
v. to speak or act in a rude or contemptuous manner; to 
offend; to affront 
insurance 
n. contract by which property or persons are guaranteed 
against damage or loss 
Forms: insulted; insulted; insulting Forms: plural: insurance 
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insure 
v. to provide a guarantee against possible damage or 
loss; to make certain 
integrity 
n. honesty; uprightness; morality; wholeness; unity 
Forms: insured; insured; insuring Forms: plural: no plural 
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intelligence 
n. ability to reason and understand; cleverness; brilliance; 
information 
intend 
v. to plan; to mean; to have in mind do or accomplish; to 
designate for a particular purpose 
Forms: plural: no plural Forms: intended; intended; intending 
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intense 
adj. extreme; great; powerful; strong; profound 
intensify 
v. to increase; to strengthen; to heighten 
Forms: intensified; intensified; intensifying 
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intensity 
n. strength; energy; extreme degree; depth; clarity 
intensive 
adj. characterized by a high degree; highly concentrated 
Forms: plural: intensities 
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intent 
n. plan; goal; aim; objective; meaning 
intent 
adj. concentrated; focused; determined; resolute; 
purposeful 
Forms: plural: intents 
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intention 
n. plan; aim; goal; purpose 
interchangeable 
adj. can be traded; can be substituted by something else 
Forms: plural: intentions 
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I 3420 TOEIC Vocabulary Words 
interest 
n. concern; affair; percentage on a loan which is paid 
over time 
interest 
v. to cause to become involved in; to arouse curiosity 
Forms: plural: interests Forms: interested; interested; interesting 
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interfere 
v. to impede; to obstruct; to hinder; to meddle 
interim 
adj. temporary; provisional 
Forms: interfered; interfered; interfering 
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interim 
adv. meanwhile; in the meantime 
interim 
n. temporary arrangement; in between period 
Forms: plural: interims 
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interior 
n. inside a building; inland section of a country 
interior 
adj. inner; inside; inland; of a country's domestic affairs; 
of an individual's inner life 
Forms: plural: interiors 
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interject 
v. to place between other things; to throw into the center 
of 
intermittent 
adj. not continuous; sporadic; fitful; alternately stopping 
and starting 
Forms: plural: interjected; interjected; interjecting 
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internal 
n. inner quality; intrinsic characteristic 
internal 
adj. inner; inside; located within; of a country's domestic 
affairs 
Forms: plural: internals 
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international 
adj. between countries; of relations between two or more 
countries 
internationalize 
v. to globalize; to make worldwide 
Forms: internationalized; internationalized; 
internationalizing 
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I 3420 TOEIC Vocabulary Words 
interpret interpreter 
v. to explain; to clarify; to elucidate; to understand or 
explain in a particular way 
n. person who translates from one language to another 
(orally); person how clarifies; commentator 
Forms: interpreted; interpreted; interpreting Forms: plural: interpreters 
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interrupt 
v. to stop; to discontinue; to disturb; to bring a 
conversation to a halt 
interruption 
n. disturbance; discontinuance; stoppage; cutting-off 
Forms: interrupted; interrupted; interrupting Forms: plural: interruptions 
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interview 
n. meeting at which a person is evaluated through 
questioning (as for a job) 
interview 
v. to question formally; to evaluate through questioning 
Forms: plural: interviews Forms: interviewed; interviewed; interviewing 
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interviewee 
n. person who is being asked questions; job candidate 
interviewer 
n. person who ask questions (i.e. reporter or employer) 
Forms: plural: interviewees Forms: plural: interviewers 
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intricate 
adj. complex; complicated; involved; entangled 
introduce 
v. to present for the first time; to initiate; to establish; to 
announce 
Forms: introduced; introduced; introducing 
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introduction 
n. act of acquainting one person with another; preface 
introductory 
adj. preliminary; beginning 
Forms: plural: introductions 
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invent 
v. to originate; to create; to design; to fabricate; to 
concoct 
invention 
n. creativity; resourcefulness; fabrication; falsehood 
Forms: invented; invented; inventing Forms: plural: inventions 
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inventive 
adj. creative; new; original 
inventor 
n. creator; designer 
Forms: plural: inventors 
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I 3420 TOEIC Vocabulary Words 
116 PHOTOCOPIABLE © www.english-test.net 
inventory 
n. stock; list of assets; act of checking stock 
inventory 
v. to make a detailed list of property; to summarize; to 
sum up the worth of 
Forms: plural: inventories Forms: inventoried; inventoried; inventorying 
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invest 
v. to expend money or effort for future benefits; to grant; 
to install; to cover; to authorize 
investment 
n. expenditure of money or effort for future benefits; 
authorization 
Forms: invested; invested; investing Forms: plural: investments 
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