intramural
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C2 adjective /ˌɪn.trəˈmjʊə.rəl/

intramural

Meaning
Occurring within the walls of a single institution, especially a school or college.
Example
The college organizes intramural sports competitions every semester.
C1 adjective ɪˈneɪt

Innate

Meaning
Existing from birth or natural
Example
She has an innate talent for music.
C2 noun /ˈaɪdlər/

idler

Meaning
A person who avoids work or spends time lazily.
Example
He was known as an idler who wasted his days.
B1 adjective /ɪnˈvɑːlvd/

involved

Meaning
complicated or engaged in something
Example
She was deeply involved in community service.
C2 adjective /ˌɪntərˈlɒkjətəri/

interlocutory

Meaning
Given during the course of a legal action, not final but temporary or provisional.
Example
The judge issued an interlocutory order to maintain the status quo until the hearing.
C1 noun /ˈɪnkwest/

inquest

Meaning
A legal or official inquiry, especially into the cause of a death.
Example
The inquest revealed the cause of the accident.
C1 adverb /ˌɪn.ədˈvɜːr.tənt.li/

Inadvertently

Meaning
without being aware of what you are doing; unintentionally; by mistake
Example
She inadvertently deleted the important file while cleaning her computer.
A2 verb /ɪmˈpruːv/

improve

Meaning
to make or become better; to enhance quality or condition
Example
Practice helps improve your skills.
B1 noun ˌɪnspɪˈreɪʃən

inspiration

Meaning
The process of being mentally stimulated to do or feel something, especially to do something creative.
Example
His journey to success became an inspiration for many.
B1 noun ˈɪn.də.stri

industry

Meaning
Economic activity concerned with the processing of raw materials and manufacture of goods in factories.
Example
The industry focuses on luxury experiences.
C2 verb /ɪˈnjʊər/

inure

Meaning
To become accustomed to something, especially something unpleasant.
Example
Soldiers quickly became inured to the harsh conditions.
C2 adjective /ɪnˈæpt/

Inapt

Meaning
not suitable; inappropriate; unfit
Example
His comment was inapt for the formal meeting.
C2 adjective /ˌɪndaɪˈdʒestəbəl/

Indigestible

Meaning
difficult or impossible to digest; hard to process in the stomach
Example
The old bread became hard and indigestible.
C1 adjective /ɪˈrɛpərəbəl/

Irreparable

Meaning
impossible to repair or fix; permanent damage that cannot be undone
Example
The accident caused irreparable damage to his spine.
B2 verb /ɪmˈpoʊzd/

imposed

Meaning
forced something to be accepted or put in place
Example
The government imposed new regulations on the industry.
C2 verb /ɪmˈpeɪl/

impale

Meaning
to pierce or fix something with a sharp object
Example
The knight was impaled by the enemy’s spear.
B1 adjective /ɪˈnɪʃəl/

initial

Meaning
Existing or occurring at the beginning.
Example
Her initial reaction was one of surprise.
C1 adjective /ɪˈledʒ.ə.bəl/

illegible

Meaning
Not clear enough to be read; unreadable.
Example
The doctor’s handwriting was almost illegible.
B2 adjective /ɪnˈtɛns/

intense

Meaning
Of extreme force, degree, or strength.
Example
She felt intense pain after the accident.
B2 noun /ɪnˈtɪəriər/

interior

Meaning
the inside part of something; inner area of a place or object
Example
The interior of the hotel was beautifully decorated.
B2 noun /ɪnˈtɜː.prə.tər/

Interpreter

Meaning
a person who translates orally from one language into another; someone who explains meaning
Example
The international conference hired professional interpreters to translate speeches in real time.
C1 adjective /ˈɪnsələnt/

insolent

Meaning
showing a rude and arrogant lack of respect
Example
The insolent student refused to follow the teacher's instructions.
B2 adjective ɪˈmɜː.sɪv

immersive

Meaning
Providing, involving, or characterized by deep absorption or immersion in something.
Example
Virtual reality creates an immersive learning environment.
C1 adjective ˈɪn.lənd

Inland

Meaning
Situated in the interior of a country; away from the coast.
Example
Inland transport boosts local trade.
C1 noun ɪnˈsɛpʃən

inception

Meaning
The establishment or starting point of an institution or activity.
Example
The inception of the company marked a new era in the industry.
B2 noun /ˈaɪ.dəl/

Idol

Meaning
an image or representation of a god used as an object of worship; a person who is greatly admired
Example
The singer became a teenage idol after her hit song topped the charts worldwide.
C2 noun /ˌɪməʊˈbɪləti/

immobility

Meaning
The state of being unable to move.
Example
After the accident, she suffered from immobility in her legs.
A2 noun /ˈɪlnəs/

illness

Meaning
A condition of being unwell or suffering from a disease.
Example
She missed school due to a serious illness.
C2 adjective /ɪnˈvɪdiəs/

invidious

Meaning
likely to arouse resentment, envy, or anger in others
Example
The manager's invidious remarks created tension among the employees.
B2 noun ˌɪnɪˈkwɒlɪti

inequality

Meaning
Difference in size, degree, circumstances, etc.; lack of equality.
Example
The theme of inequality is prominent throughout the story.
C2 adjective /ɪnˈkoʊətɪv/

inchoative

Meaning
relating to the beginning of something; in an initial stage
Example
The poet used inchoative expressions to depict the dawn of creation.
B2 adjective /ˌɪntəˈpɜːsənl/

interpersonal

Meaning
Relating to relationships or communication between people.
Example
He has excellent interpersonal skills and gets along well with others.
C1 adjective ˌɪn.tə.dʒen.əˈreɪ.ʃən.əl

intergenerational

Meaning
Existing or occurring between different generations of a family.
Example
Intergenerational wisdom ensures cultural continuity.
C1 verb /ɪmˈpiːd/

impede

Meaning
To obstruct or hinder the progress or development of something.
Example
Lack of funds can impede business growth.
C1 noun ˈɪm.pɪ.təs

impetus

Meaning
The force or motivation that drives something forward; momentum.
Example
The new policy provided an impetus for economic growth.
C2 noun /ɪkˈsɔːr.ə/

Ixora

Meaning
a tropical flowering shrub with clusters of small bright red, orange, or yellow flowers
Example
The bright red ixora bushes lined the pathway to the tropical garden.
C2 adjective ɪnˈdɒm.ɪ.tə.bəl

indomitable

Meaning
Impossible to subdue or defeat.
Example
Her indomitable spirit helped her overcome adversity.
C2 noun /ɪmˈpaɪ.ə.ti/

Impiety

Meaning
lack of piety or reverence, especially for a god; disrespect or irreverence toward religious matters
Example
His impiety shocked the religious community when he mocked their sacred ceremonies.
C2 verb /ˈɪmprɪkeɪt/

imprecate

Meaning
To utter a curse or invoke evil upon someone.
Example
The old woman imprecated her enemies with dark words.
C1 noun /ɪmˈpɛd.ɪ.mənt/

impediment

Meaning
A hindrance or obstruction in doing something; something that prevents progress.
Example
Lack of funds is a major impediment to the project.
C1 adjective /ˌɪnsərˈmaʊntəbl/

insurmountable

Meaning
Too great to be overcome.
Example
The explorers faced insurmountable odds in the desert.
B2 adjective /aɪˈrɒnɪkəl/

ironical

Meaning
expressing irony; having the nature of irony
Example
Her ironical tone made everyone uncomfortable.
A2 noun /ˈɪntəvjuː/

interview

Meaning
A meeting of people face to face, especially for consultation.
Example
The interview was conducted in a calm and professional manner.
C2 noun /ˈaɪ.kɒn/

ikon

Meaning
A religious image or symbol, especially in the Eastern Orthodox Church.
Example
The church displayed a beautifully painted ikon of the Virgin Mary.
C2 noun /ˌɪmprəˈpraɪəti/

impropriety

Meaning
Failure to observe standards of honesty or modesty; improper behavior.
Example
The politician was accused of financial impropriety.
B2 noun ɪˈmjuː.nɪ.ti

immunity

Meaning
The ability of an organism to resist a particular infection or toxin by the action of specific antibodies.
Example
A strong immunity protects against infections.
C2 verb /ɪnˈveɪ/

inveigh

Meaning
To speak or write about something with great hostility and criticism.
Example
He inveighed against the corruption in government.
B2 adjective /ɪmˈplɪsɪt/

implicit

Meaning
Suggested or understood without being directly stated.
Example
Her trust in him was implicit.
C2 verb /ˌɪntərˈmɪt/

intermit

Meaning
To suspend or stop for a time; to pause intermittently.
Example
The rain would intermit and then start again.
C2 adjective /ɪmˈplaɪəbl/

impliable

Meaning
Capable of being implied or suggested.
Example
The meaning of the statement is not directly clear but is impliable from the context.
C1 noun /ˌɪməˈrælɪti/

immorality

Meaning
the quality of being immoral; behavior that violates accepted moral standards
Example
The community condemned the immorality of the corrupt officials.
B2 verb /ˈɪr.ɪ.teɪt/

irritate

Meaning
To make someone annoyed or angry; to cause discomfort or inflammation.
Example
Rubbing your eyes can irritate them.
B2 noun /ˈɪnvənˌtɔːri/

inventory

Meaning
A complete list of items, such as goods in stock or property.
Example
The shopkeeper checked the inventory before opening the store.
B2 noun ˌɪn.stəˈleɪ.ʃən

installation

Meaning
The action or process of installing someone or something, or of being installed.
Example
The installation of the submarine cable is almost complete.
C1 noun /ˌɪn.dʒəˈnjuː.ɪ.ti/

ingenuity

Meaning
The quality of being clever, original, and inventive.
Example
His ingenuity led to groundbreaking innovations.
C2 adjective /ɪnˈvɛtərət/

inveterate

Meaning
having a long-established habit, activity, or interest that is unlikely to change
Example
He is an inveterate reader who spends hours in the library every day.
C1 verb /ɪnˈtruːd/

intrude

Meaning
To enter a place or situation where one is not wanted or not invited.
Example
He felt embarrassed to intrude on their private conversation.
C2 adjective /ɪnˈsɪpɪd/

insipid

Meaning
lacking flavor, interest, or excitement; dull
Example
The soup was insipid and needed more seasoning.
B1 adjective /ɪnˈtɜːrnəl/

internal

Meaning
situated inside; relating to the inside or inner part of something
Example
The company is conducting an internal audit this month.
B2 adjective /ˈɪmɪnənt/

imminent

Meaning
About to happen; likely to occur very soon.
Example
Dark clouds signaled that a storm was imminent.
B2 noun ˌɪn.əˈveɪ.ʃən

innovation

Meaning
The action or process of innovating; a new method, idea, product, etc.
Example
Innovation drives solutions to global challenges.
C1 verb /ɪmˈpɪndʒ/

impinge

Meaning
to have an effect or impact on something; to encroach or infringe
Example
The noise from the construction site impinges on our daily activities.
C2 verb /ˌɪntərˈlɒk/

interlock

Meaning
to fit or connect together securely so that two or more things are joined
Example
The gears interlock to ensure smooth movement of the machine.
B2 adverb /ɪmˈpɒlɪtli/

impolitely

Meaning
in a rude or discourteous manner; without showing respect or proper manners
Example
He spoke impolitely to the waiter despite the polite service.
C1 adjective /ɪnˈtændʒəbl/

intangible

Meaning
Unable to be touched or grasped; not having a physical presence.
Example
Trust is an intangible quality in relationships.
C1 noun /ˈɪnˌmeɪt/

inmate

Meaning
a person confined to an institution such as a prison or hospital
Example
The prison has over a thousand inmates.
C1 noun /ˈɪn.floʊ/

inflow

Meaning
The movement of things such as money, people, or water into a place.
Example
The inflow of tourists boosted the local economy.
C1 adjective /ɪnˈdiːsənt/

indecent

Meaning
not conforming to accepted standards of behavior or morality; improper or offensive
Example
He was warned for making an indecent remark during the meeting.
C2 adjective /ˌɪnkəmˈprɛsəbl/

incompressible

Meaning
Not able to be pressed or squeezed into a smaller space.
Example
Liquids are generally considered incompressible.
C1 noun /ˈɪtʃ.i.nəs/

itchiness

Meaning
The quality or condition of feeling an irritating sensation on the skin that causes a desire to scratch.
Example
Eye itchiness often leads to rubbing.
C1 noun /ɪmˈpɛdɪmənt/

impediments

Meaning
A hindrance or obstruction in doing something; things that prevent progress or achievement.
Example
Economic impediments often hinder social development.
C1 adjective /ɪnˈtræk.tə.bəl/

intractable

Meaning
Difficult or impossible to manage, control, or solve.
Example
The conflict has become an intractable problem.
C2 verb /ɪmˈpjuːt/

impute

Meaning
to attribute a fault or responsibility to someone
Example
They imputed the company's success to good leadership.
C2 noun /ˈɪkθiəˌsɔːrz/

ichthyosaurs

Meaning
Extinct marine reptiles that resembled fish and dolphins, dominant during the Mesozoic era.
Example
Ichthyosaurs were swift predators of the ancient seas.
C2 adjective /ˌɪnsəˈluːbriəs/

insalubrious

Meaning
Unhealthy or not conducive to well-being.
Example
They moved out of the insalubrious neighborhood for the sake of their health.
B2 noun ˌɪn.fləˈmeɪ.ʃən

inflammation

Meaning
A localized physical condition in which part of the body becomes reddened, swollen, hot, and often painful.
Example
Chronic inflammation can lead to severe diseases.
C1 noun /ɪnˌkɑːsəˈreɪʃən/

incarceration

Meaning
the state of being imprisoned or confined
Example
The criminal faced years of incarceration for his crimes.
C1 noun /ˈɪŋ.krə.mənt/

Increment

Meaning
an increase or addition, especially one of a series on a fixed scale; a regular increase in salary
Example
He received an annual increment of five percent in his salary this year.
B1 noun /ɪnˈvɛstər/

investor

Meaning
a person or organization that puts money into financial schemes, property, or business ventures with the expectation of achieving a profit
Example
The investor funded the startup with a large sum of money.
C2 noun /ɪˌluːmɪˈnɑːti/

illuminati

Meaning
a group of people claiming to have special enlightenment or secret knowledge, often linked to conspiracies
Example
Many conspiracy theories involve the Illuminati as a secret world-controlling group.
C2 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
C2 noun /ˈaɪdɪl/

idyll

Meaning
An extremely happy, peaceful, or picturesque episode or scene, often idealized.
Example
Their honeymoon was an idyll on a tropical island.
C2 noun /ɪˈnænɪti/

inanity

Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
B2 adjective /ˌɪrɪˈzɪstəbəl/

Irresistible

Meaning
too attractive and tempting to be resisted; impossible to resist
Example
The chocolate cake was absolutely irresistible.
C1 noun ˌɪnˈsaɪtfʊlnɪs

insightfulness

Meaning
The capacity to gain an accurate and deep intuitive understanding of a person or thing.
Example
His insightfulness helped solve the complex problem.
A2 adjective /ɪmˈpɑːsəbl/

impossible

Meaning
not able to occur, exist, or be done
Example
It is impossible to finish this work in one day.
C2 adjective /ɪˈmɪsəbl/

immiscible

Meaning
Describes liquids that do not mix together.
Example
Oil and water are immiscible liquids.
C1 adjective /ɪmˈprɒbəbl/

improbable

Meaning
Not likely to be true or to happen.
Example
It seems improbable that he will arrive on time.
C1 adjective /ɪnˈkwɪzɪtɪv/

inquisitive

Meaning
Curious or eager to learn and ask questions.
Example
The inquisitive child asked endless questions about the stars.
C1 noun /ˌɪnkjʊˈbeɪʃən/

incubation

Meaning
the process of keeping eggs, cells, or organisms in the right conditions for development
Example
The incubation of the eggs lasted for three weeks.
C2 adjective /ɪnˈsuːsiənt/

insouciant

Meaning
Showing a casual lack of concern; carefree.
Example
He gave an insouciant shrug and walked away.
C1 noun /ˈɪŋklɪŋ/

inkling

Meaning
A slight idea, hint, or suspicion about something.
Example
She had an inkling that he was planning a surprise.
C1 noun /ɪmˌpɜː.sənˈeɪ.ʃən/

impersonation

Meaning
The action of pretending to be another person for the purpose of entertainment or fraud.
Example
Online impersonation is a serious cybercrime.
B2 adjective /ɪnˈfekʃəs/

infectious

Meaning
capable of causing infection or disease; spreading easily from one person to another; able to spread feelings or attitudes such as enthusiasm
Example
Her infectious laughter made everyone in the room smile.
C2 adjective /ˌɪrɪˈdjuːsəbl/

irreducible

Meaning
impossible to reduce or simplify further
Example
The fraction 3/7 is irreducible.
C1 adjective /ˌɪndɪˈfɛnsəbl̩/

indefensible

Meaning
not able to be protected or justified
Example
The minister’s remarks were considered indefensible by the public.
B2 noun /aɪˈdiː/

id

Meaning
identification; a document or number used to prove who someone is
Example
Please show your ID at the entrance.
B2 verb /ˈɪmɪɡreɪt/

immigrate

Meaning
to come to live permanently in a foreign country
Example
He immigrated to Canada five years ago.
C2 adjective /ɪnˈtɛsteɪt/

intestate

Meaning
Having died without leaving a valid will.
Example
She died intestate, so her assets were distributed by law.
C2 adjective /ˌɪrɪˈkɒnsɪləbl/

irreconcilable

Meaning
impossible to make compatible or bring into harmony; unable to resolve differences
Example
The couple separated due to irreconcilable differences.
B2 adjective /ˌɪntərˈmiːdiət/

intermediate

Meaning
Coming between two things in time, place, or order; in the middle level or stage.
Example
She is taking an intermediate-level French course.
B1 verb /ɪnˈvɛs.tɪ.ɡeɪt/

investigate

Meaning
to carry out a systematic inquiry to discover facts or information
Example
The police will investigate the incident thoroughly.
C2 adjective /ˌɪndɪˈtɜːrmənət/

indeterminate

Meaning
Not exactly known, defined, or established; vague or uncertain.
Example
The project was delayed for an indeterminate amount of time.
C1 verb /ɪˈnɔːɡjʊreɪt/

inaugurate

Meaning
To formally begin or introduce something, especially with a ceremony.
Example
The mayor will inaugurate the new bridge tomorrow.
C1 noun /ɪmˈprɪzənmənt/

imprisonment

Meaning
the act of putting someone in prison; the state of being confined as punishment
Example
He faced imprisonment for violating the court order.
C1 adjective /ɪˈnɔːrdənət/

inordinate

Meaning
Excessive or unusually large in degree.
Example
She spent an inordinate amount of time on her phone.
B1 noun ˈɪmpækt

impact

Meaning
A strong effect or influence; the action of one object coming forcibly into contact with another.
Example
The decision had great impact.
C1 adjective ɪnˈkʌm.bənt

incumbent

Meaning
necessary for (someone) as a duty or responsibility.
Example
It is incumbent upon all citizens to obey the law.
C2 adjective /ˈɪnˌbrɛd/

inbred

Meaning
existing naturally in a person or animal; also related to reproduction within a limited community
Example
He has an inbred sense of loyalty.
C2 noun /ɪnˈsuːsiəns/

insouciance

Meaning
Casual lack of concern; indifference.
Example
She carried herself with an air of insouciance, unbothered by the challenges ahead.
C2 adjective /ˌaɪdəˈlɑːtrɪəs/

idolatrious

Meaning
Excessively devoted or reverent towards idols or false gods.
Example
The ancient tribe was known for its idolatrious practices.
C1 verb /ˈɪnsjuleɪt/

insulate

Meaning
To protect something by covering it, especially to prevent heat, sound, or electricity from escaping or entering.
Example
The house was insulated to reduce heating costs.
B2 adjective /ɪˈrɪˌspɑn.sə.bəl/

Irresponsible

Meaning
lacking a sense of responsibility; careless
Example
It was irresponsible of him to leave without telling anyone.
B2 verb /ɪnˈdʒɛkt/

inject

Meaning
To introduce a substance, especially a drug, into the body using a needle.
Example
The nurse will inject the vaccine into the patient's arm.
C1 adjective /ˈɜːrksəm/

irksome

Meaning
annoying or irritating
Example
Waiting in a long line is one of the most irksome tasks.
C1 noun /ɪnˈsek.tɪ.saɪd/

Insecticide

Meaning
a substance used for killing insects; a chemical pesticide that targets insects
Example
The farmer sprayed insecticide on his crops to protect them from harmful bugs.
C1 adjective /ɪnˈæk.tɪv/

Inactive

Meaning
not active; not working; dormant; idle
Example
The volcano has been inactive for over a century.
C1 adjective ˌɪm.pəˈsɛp.tɪ.bəl

imperceptible

Meaning
So subtle or gradual that it is difficult to notice or perceive
Example
The changes in his behavior were imperceptible at first.
B2 adjective /ɪnˈtriːɡɪŋ/

intriguing

Meaning
very interesting and unusual; arousing curiosity
Example
The movie has an intriguing plot that keeps the audience hooked.
B2 noun /ˈɪntərfeɪs/

interface

Meaning
a point where two systems, subjects, or organizations meet and interact
Example
The user interface is designed to be intuitive and user-friendly.
C1 noun /ɪnˈædɪkwəsi/

inadequacy

Meaning
lack of sufficient ability, quality, or strength; a feeling of not being good enough
Example
She struggled with feelings of inadequacy at work despite her strong qualifications.