Intermediate Vocabulary Words

Academic vocabulary common across TOEFL, IELTS, and multi-test contexts. These words appear in university-level texts and are essential for scoring well on standardized English proficiency tests.

6223 words · Page 52 of 104

innovative TOEFL

Featuring new methods or ideas; advanced and original.

innuendo SAT GRE TOEFL

An indirect or subtle, often negative, suggestion about someone or something.

innumerable SAT TOEFL

Too many to be counted; countless.

inoffensive SAT TOEFL

Not likely to offend or harm anyone; harmless and polite.

inopportune SAT TOEFL

Badly timed or inconvenient.

inordinate GRE TOEFL

Excessively large or beyond reasonable limits.

inquiry TOEFL IELTS

An act of asking for information or conducting a formal investigation.

inquisitive SAT TOEFL

Curious or eager to know things; given to asking questions.

inroad SAT GRE TOEFL

Progress or advancement, often in the context of making gains against opposition or resistance.

insane GRE TOEFL IELTS

Mentally ill or exhibiting extreme irrationality or recklessness.

insanity GRE TOEFL

The state of being seriously mentally ill or extreme foolishness.

insatiable SAT TOEFL

Impossible to satisfy or quench, often referring to appetite or desire.

inscrutable SAT GRE TOEFL

Difficult or impossible to understand or interpret.

insensible SAT TOEFL

Unconscious or unaware; also, showing no sensitivity.

insert GRE IELTS

To place something into something else.

insidious SAT GRE TOEFL

Proceeding in a subtle or gradual way, but with harmful effects.

insight SAT TOEFL IELTS

The capacity to gain a deep understanding of something.

insignificant SAT TOEFL IELTS

Lacking importance, meaning, or value.

insinuate SAT GRE TOEFL

To suggest something indirectly or subtly.

insipid SAT GRE TOEFL

Lacking flavor or interest; dull.

insist TOEFL IELTS

To demand something firmly or be certain about a fact or requirement.

insistence SAT GRE TOEFL

The act of demanding something forcefully or persistently.

insolence SAT TOEFL

The quality of being disrespectful or rude, especially to someone in authority.

insolent SAT GRE TOEFL IELTS

Rudely bold or disrespectful in manner.

insolvent GRE TOEFL

Unable to pay debts when they are due; bankrupt.

inspect TOEFL IELTS

To examine something carefully, often to check for problems or ensure quality.

inspection GRE TOEFL IELTS

The act of carefully examining something, often officially.

inspector SAT TOEFL IELTS

A person who examines or investigates something, typically in an official capacity.

inspiration GRE TOEFL IELTS

The process of being mentally stimulated to do something creative or meaningful.

inspire TOEFL IELTS

To fill someone with the urge or ability to do something creative or positive.

inspiring TOEFL IELTS

Causing feelings of motivation, admiration, or creativity.

install TOEFL IELTS

To set up or connect equipment so it's ready for use.

installment GRE TOEFL

One of several parts of a payment or a serial publication paid or released at intervals.

instantaneous SAT GRE TOEFL

Happening or done immediately, without any delay.

instigate SAT GRE TOEFL

To bring about or initiate an action or event, often something negative or disruptive.

instill SAT GRE TOEFL

To gradually introduce a quality or idea into someone’s mind.

instinct TOEFL IELTS

An innate, natural impulse or behavior pattern in response to certain stimuli.

instinctive TOEFL

Done without conscious thought; natural and automatic.

instinctively TOEFL

In a way that is natural and automatic, without deliberate thought.

institute GRE TOEFL IELTS

To establish or initiate a system, policy, or process.

institution TOEFL IELTS

An established organization or foundation, or a well-established practice or custom.

institutionalize TOEFL

To establish or organize something as a standard practice, norm, or institution within a society or ...

instruct TOEFL IELTS

To teach or give directions to someone on how to do something.

instruction TOEFL IELTS

A direction or guideline explaining how to do something, or the act of teaching.

instructive SAT TOEFL IELTS

Providing useful information or education; teaching something valuable.

instrument TOEFL IELTS

A tool or device designed for a specific function, especially in music, science, or medicine.

instrumental GRE TOEFL

Essential or crucial in achieving a result; also, relating to a musical instrument.

instrumentalist TOEFL

A musician who plays a musical instrument, especially one who does not sing.

insufficient SAT GRE TOEFL IELTS

Not enough in quantity or quality to meet a need.

insulation TOEFL IELTS

Material used to prevent the transfer of heat, electricity, or sound.

insulin GRE TOEFL

A hormone produced by the pancreas that regulates blood sugar levels.

insult SAT TOEFL IELTS

A disrespectful or offensive remark or action.

insuperable SAT GRE TOEFL

Impossible to overcome or deal with.

insure TOEFL IELTS

To arrange for financial protection through an insurance policy.

insurmountable TOEFL

Too great to be overcome or surpassed.

insurrection SAT GRE TOEFL

A violent uprising against an authority or government.

intact GRE TOEFL IELTS

In a complete or original state; not damaged or altered.

integral TOEFL

Necessary to make a whole complete; essential.

integrate GRE TOEFL

To combine one thing with another so as to form a whole.

integrated TOEFL

Combined into a unified whole or system.

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