Imposture
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C2 noun /ɪmˈpɒs.tʃər/

Imposture

Meaning
the practice of deceiving others by pretending to be someone else; fraudulent deception
Example
The elaborate imposture lasted for months before investigators uncovered the truth.
B2 adjective /ɪnˈtriːɡɪŋ/

intriguing

Meaning
very interesting and unusual; arousing curiosity
Example
The movie has an intriguing plot that keeps the audience hooked.
C1 verb /ɪɡˈnaɪt/

ignite

Meaning
To catch fire or cause to catch fire; to start or arouse.
Example
The sparks ignited the dry leaves in seconds.
C1 noun /ɪˈreləvəns/

irrelevance

Meaning
the quality of not being connected to or important for a particular matter; lack of significance
Example
His long explanation only highlighted the irrelevance of the details to the main issue.
C1 noun ɪnˈdʌldʒəns

indulgence

Meaning
The practice of allowing oneself to enjoy the pleasure of something.
Example
His indulgence in junk food affected his health.
B1 noun ɪˈnɪʃətɪv

initiative

Meaning
An act or strategy intended to resolve a difficulty or improve a situation; a fresh approach to something.
Example
NASA's initiative to return humans to the Moon is ambitious.
C2 adjective /ˌɪndɪˈfætɪɡəbl̩/

indefatigable

Meaning
persisting tirelessly; incapable of being fatigued
Example
Her indefatigable spirit kept the team motivated during the long project.
C1 verb /ˈɪnkjʊˌbeɪt/

incubate

Meaning
to keep eggs, cells, or organisms at the right conditions for development
Example
The hen will incubate the eggs until they hatch.
B2 noun, verb /ˌɪnkənˈviːniəns/

inconvenience

Meaning
trouble or difficulty caused to someone; to cause trouble or difficulty to someone
Example
We apologize for any inconvenience caused by the delay.
B2 verb ˈɪmplɪment

implement

Meaning
To put a decision or plan into effect; to execute or apply.
Example
Implementing educational policies is essential for progress.
B2 noun /ɪnˈkwaɪəri/ or /ˈɪnkwəri/

inquiry

Meaning
An act of asking for information; an investigation into something.
Example
The committee launched an inquiry into the financial irregularities.
C1 verb ɪmˈbjuː

Imbue

Meaning
Mixing some idea or feeling deeply into someone's mind
Example
The teacher tried to imbue students with a love for learning.
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.
C1 noun /ˌɪmpɔːrˈteɪʃən/

importation

Meaning
The act of bringing goods or services into a country from abroad
Example
The importation of luxury goods is strictly regulated.
C2 noun /ɪnˈfriːkwəns/

infrequence

Meaning
The state of occurring rarely or at long intervals.
Example
The infrequence of their meetings made it hard to maintain close ties.
C1 verb /ɪnˈklaɪn/

incline

Meaning
to feel willing or favorably disposed toward something; to bend or tilt
Example
She is inclined to agree with the proposal.
B2 noun /ɪmˈpeɪʃəns/

impatience

Meaning
The state of being quickly irritated or unable to wait calmly.
Example
His impatience grew as the meeting dragged on.
C2 adjective /ɪˈmɒdərət/

immoderate

Meaning
excessive; beyond reasonable limits
Example
He has an immoderate love for sweets.
C1 adjective /ɪmˈpɛndɪŋ/

impending

Meaning
about to happen soon, usually something unpleasant or threatening
Example
The villagers were worried about the impending flood.
C1 noun /ɪnˈsæn.ə.ti/

Insanity

Meaning
the state of being seriously mentally ill; extreme foolishness or irrationality
Example
The defense lawyer argued that his client was not guilty by reason of insanity.
C2 adjective /ˌɪrɪˈfrændʒɪbəl/

irrefrangible

Meaning
Not to be broken, violated, or infringed
Example
The constitution guarantees certain irrefrangible rights to every citizen.
C1 verb /ɪnˈkɜːr/

incur

Meaning
To bring upon oneself something undesirable, usually as a result of actions.
Example
He incurred a fine for parking in the wrong place.
B1 verb ɪnˈkriːsɪŋ

increasing

Meaning
Becoming or making greater in size, amount, intensity, or degree; growing.
Example
Increasing awareness about education is necessary.
C1 adjective /ɪnˈdɪɡnənt/

indignant

Meaning
Feeling or showing anger at something considered unfair or unjust.
Example
She was indignant when accused of cheating.
B1 adjective /ˌɪmpəˈlaɪt/

impolite

Meaning
Not showing good manners; rude.
Example
It is impolite to interrupt someone while they are speaking.
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.
C1 adjective /ˌɪndɪˈvɪzəbl/

indivisible

Meaning
Not able to be divided or separated.
Example
The country's unity was indivisible despite differences.
A1 preposition/adverb/adjective/noun /ˌɪnˈsaɪd/

inside

Meaning
Situated within something; the inner part of something.
Example
She waited inside the house until the rain stopped.
A2 adjective, noun /ɪˈtæliən/

italian

Meaning
relating to Italy, its people, or its language; a person from Italy
Example
She loves Italian food.
C2 noun /aɪər/

ire

Meaning
intense anger or rage
Example
The new policy provoked the ire of the employees.
C2 noun /ˈɪndɪkənt/

indicant

Meaning
Something that indicates or points to a fact or condition.
Example
High fever is often an indicant of infection.
C2 noun /ˌɪn.təˈvɛn.ʃə.nɪ.zəm/

interventionism

Meaning
Government policy of active involvement in economic affairs.
Example
The central bank's interventionism helped stabilize inflation.
C2 noun /aɪˈdɒlətri/

idolatry

Meaning
The worship of idols or extreme admiration for someone or something.
Example
The priest condemned the idolatry practiced in the village.
C1 noun ˌɪntədɪˈpɛndənsi

interdependency

Meaning
The dependence of two or more people or things on each other.
Example
The interdependency of the countries led to greater cooperation.
C1 noun /ˈɪmɪnəns/

imminence

Meaning
the state of being about to happen
Example
The imminence of the storm forced people to take shelter.
C1 adjective ˈɪn.tər.ɪm

interim

Meaning
In or for the intervening period; provisional or temporary.
Example
Interim governments manage transitional phases.
C2 adjective /ɪnˈkɒrɪdʒəbəl/

incorrigible

Meaning
incapable of being corrected, improved, or reformed
Example
He is an incorrigible optimist who never loses hope.
C1 adjective /ˌɪndɪˈspjuːtəbəl/

Indisputable

Meaning
impossible to deny or argue against; undeniable; certain
Example
The evidence against him was indisputable.
C2 noun /ɪmˈpjuːɪsəns/

impuissance

Meaning
inability to take effective action; helplessness
Example
The government’s impuissance in the face of crisis frustrated the people.
C1 noun /ˈɪntərˌpleɪ/

interplay

Meaning
The way in which two or more things have an effect on each other.
Example
The interplay between culture and technology shapes modern life.
B2 adjective, noun /ɪzˈreɪli/

israeli

Meaning
relating to Israel or its people; a person from Israel
Example
She works for an Israeli company.
A2 noun/verb /ˈɪntrəst/ or /ˈɪntəˌrɛst/

interest

Meaning
A feeling of curiosity or concern about something; or money paid for the use of borrowed money.
Example
He showed great interest in learning new languages.
C1 adjective /ˌɪndɪˈstɪŋkt/

indistinct

Meaning
Not clear or sharply defined; vague or blurred.
Example
The sound of voices was indistinct in the distance.
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.
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.
B2 adjective /ɪnˈklaɪnd/

inclined

Meaning
having a tendency or disposition toward something
Example
He is inclined to help those in need.
C1 verb /ɪmˈploʊd/

implode

Meaning
To collapse or burst inward violently.
Example
The old building imploded during the demolition.
A1 noun /ˈɪntənet/

internet

Meaning
A global computer network providing a variety of information and communication facilities.
Example
The internet has revolutionized the way we access information.
C1 verb /ˈaɪdəlaɪz/

idolize

Meaning
To admire or worship someone excessively.
Example
Fans often idolize celebrities for their talent and lifestyle.
C1 adjective ˌɪdiəsɪnˈkrætɪk

idiosyncratic

Meaning
Relating to idiosyncrasy; peculiar or individual.
Example
His idiosyncratic behavior set him apart from his colleagues.
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 adjective /ˌɪnkəmˈpætəbl/

incompatible

Meaning
Not able to exist or work together without conflict.
Example
Their personalities were completely incompatible.
C2 noun /ˈɪn.fɪ.del/

Infidel

Meaning
a person who does not believe in religion or whose religious beliefs differ from one's own
Example
In historical contexts, crusaders often referred to their enemies as infidels.
B2 noun /ɪnˈdʌstriəl ˌrɛvəˈluːʃən/

Industrial Revolution

Meaning
The rapid development of industry that occurred in Britain in the late 18th and 19th centuries, brought about by the introduction of machinery and characterized by the use of steam power and the growth of factories.
Example
The Industrial Revolution marked a shift in production processes.
B2 noun /ɪnˈfɪnɪti/

infinity

Meaning
A concept describing something without any limit or end.
Example
The universe seems to stretch into infinity.
C2 noun /ɪmˈpʌlʃən/

impulsion

Meaning
a strong urge or drive to act; the act of impelling
Example
His impulsion to travel made him leave his job suddenly.
C1 adjective /ɪnˈhɛrənt/

inherent

Meaning
Existing in something as a natural, permanent, or essential quality.
Example
There are inherent risks in extreme sports.
C1 noun /ɪnˈsaɪtmənt/

incitement

Meaning
the action of provoking unlawful or violent behavior
Example
He was arrested for incitement to riot.
C1 verb /ɪmˈbɛd/

imbed

Meaning
To fix firmly or deeply in a surrounding mass.
Example
The journalist imbedded himself with the troops to report firsthand.
C1 verb /ɪnˈfleɪm/

inflame

Meaning
to arouse strong feelings or provoke anger; to cause inflammation in the body
Example
The politician's remarks served to inflame public opinion.
C2 adjective /ɪmˈperɪʃəbəl/

Imperishable

Meaning
not subject to decay; lasting forever; eternal
Example
The imperishable beauty of classical art continues to inspire generations.
C2 adjective /ɪnˈkɒnstənt/

inconstant

Meaning
frequently changing; not consistent or dependable
Example
His inconstant moods made it difficult to work with him.
C2 noun /ɪnˈtɛnʃən/

intension

Meaning
The internal content of a concept; the set of attributes implied by a word or phrase.
Example
The intension of the word 'dog' includes being a mammal and domesticated.
B1 noun /ˈɪn.flu.əns/

Influence

Meaning
the capacity to have an effect on the character, development, or behavior of someone or something
Example
The teacher's positive influence helped the student overcome his learning difficulties.
C1 noun /ɪmˈpɒs.tər/

Impostor

Meaning
a person who pretends to be someone else in order to deceive others; a fraud
Example
The impostor convinced everyone he was a doctor until his fake credentials were discovered.
C1 noun /ˌɪn.dʒəˈnjuː.ɪ.ti/

ingenuity

Meaning
The quality of being clever, original, and inventive.
Example
His ingenuity led to groundbreaking innovations.
B1 noun /ˈɪnsɪdənt/

incident

Meaning
an event or occurrence, often unpleasant or unusual
Example
The police quickly responded to the incident in the park.
B2 noun /ɪnˈkluːʒən/

inclusion

Meaning
the action or state of including or being included within a group or structure
Example
Diversity and inclusion are key values in modern workplaces.
A2 noun /ˈɪm.ɪdʒ/

Image

Meaning
a representation of the external form of a person or thing in art; a mental picture or impression
Example
The company worked hard to improve its public image after the scandal.
B2 adjective /ɪnˈtækt/

intact

Meaning
Remaining whole, complete, and undamaged.
Example
Despite the storm, the old house remained intact.
C2 adjective /ɪnˈæpt/

Inapt

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

Inharmonious

Meaning
lacking harmony; discordant in sound; not in tune
Example
The inharmonious sounds from the broken piano made everyone cover their ears.
C1 noun /ɪmˌpɒsəˈbɪlɪti/

impossibility

Meaning
the state or fact of being impossible; something that cannot be done or achieved
Example
Finishing the project in one day was an impossibility.
C2 adjective /ˌɪnkəmˈbʌstəbl/

incombustible

Meaning
Not capable of catching fire or burning.
Example
This material is incombustible and safe for construction.
C1 noun /ɪmˈbæl.əns/

Imbalance

Meaning
lack of proportion or relation between corresponding things; unequal distribution
Example
The doctor said the patient's dizziness was caused by an inner ear imbalance.
C2 adjective /ˌaɪ.kə.nəˈklæs.tɪk/

iconoclastic

Meaning
Characterized by attacking or rejecting cherished beliefs, traditions, or established values.
Example
Her iconoclastic views challenged the conventional wisdom of the industry.
C1 adjective ɪnˈsaɪ.sɪv

incisive

Meaning
Intelligently analytical and clear-thinking; showing clear thought and good understanding of what is important.
Example
His incisive comments revealed the core issues.
A2 noun/adjective /ˌɪndɪˈvɪdʒuəl/

individual

Meaning
A single human being as distinct from a group; relating to one person.
Example
Each individual has the right to freedom of speech.
C2 noun /ɪmˈpjuːnɪti/

impunity

Meaning
freedom from punishment or harmful consequences for an action
Example
The dictator ruled with impunity, ignoring international laws.
C2 noun /ˌɪntərˈrɛɡnəm/

interregnum

Meaning
A period between rulers or governments when normal leadership is suspended.
Example
The country faced instability during the interregnum after the king’s death.
C1 adjective /ˌɪnkɒmprɪˈhɛnsəbl/

incomprehensible

Meaning
Impossible or very difficult to understand.
Example
The professor’s lecture was so fast it became incomprehensible.
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.
B2 noun /ɪnˈfek.ʃən/

Infection

Meaning
the process of infecting or the state of being infected; a disease caused by germs
Example
The doctor prescribed antibiotics to treat the bacterial infection in her throat.
C1 adjective /ɪmˈpæʃənd/

impassioned

Meaning
Filled with or showing great emotion.
Example
She gave an impassioned speech about human rights.
C2 adjective /ˌɪnɪkˈsprɛsəbl/

inexpressible

Meaning
Too strong or extreme to be expressed in words.
Example
She felt inexpressible joy at the news of her success.
B2 adjective + noun aɪˈdiːəl ɪnˈvaɪrənmənt

ideal environment

Meaning
Perfect or most suitable conditions for growth or development
Example
Winter creates an ideal environment for vegetable growth.
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 /ɪˈnjʊərd/

inured

Meaning
Accustomed to something, especially something unpleasant.
Example
After years of hardship, she was inured to suffering.
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.
C1 verb /ɪnˈvælɪdeɪt/

invalidate

Meaning
To make something not valid or legally acceptable.
Example
The new evidence may invalidate the previous ruling.
C1 adjective /ɪˈmækjələt/

immaculate

Meaning
perfectly clean, neat, or free from flaws
Example
Her room was immaculate, with everything in its place.
B2 verb /ɪnˈstrʌkt/

instruct

Meaning
to teach; to give directions
Example
The teacher instructed the students carefully.
C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

Meaning
Too bad to be justified or overlooked; unforgivable.
Example
His rude behavior was inexcusable.
C2 noun /ɪnˈtɜːrmənt/

interment

Meaning
The act of burying a dead body in a grave or tomb.
Example
The interment took place at the family cemetery.
C2 adjective /ɪmˈplækəbl/

implacable

Meaning
unable to be appeased, calmed, or pacified
Example
The soldiers faced an implacable enemy who refused to surrender.
C1 noun /ˌɪn.səˌbɔːr.dɪˈneɪ.ʃən/

insubordination

Meaning
Defiance of authority; refusal to obey orders.
Example
The soldier was punished for insubordination during the mission.
B1 verb /ˌɪntəˈrʌpt/

interrupt

Meaning
to stop someone from speaking or doing something by suddenly saying or doing something
Example
She tried not to interrupt while he was speaking.
B1 abbreviation /ˌaɪˈiː/

ie

Meaning
That is to say; used to clarify or explain something more precisely.
Example
Many amphibians, i.e., frogs and salamanders, can live both in water and on land.
A2 adjective /ˈɪn.dɔːr/

indoor

Meaning
situated, occurring, or used inside a building
Example
Indoor plants can improve air quality at home.
C1 adjective /ˈɪnsjələr/

insular

Meaning
Narrow-minded, isolated, or relating to an island.
Example
The community was criticized for its insular attitudes toward outsiders.
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.
A2 noun /ˈɪn.sekt/

Insect

Meaning
a small invertebrate animal with six legs and usually one or two pairs of wings
Example
The butterfly is a beautiful insect that flies from flower to flower.
C1 adjective /ɪnˈtɛlɪdʒəbl/

intelligible

Meaning
Able to be understood; clear enough to be comprehended.
Example
Her speech was barely intelligible over the noise.
C1 adjective /ɪˈluː.sɪv/

Illusive

Meaning
deceptive; appearing to exist but not real; misleading
Example
The promise of easy money proved to be illusive and misleading.
C1 noun/verb /ˈɪmprɪnt/

imprint

Meaning
A mark or impression made by pressure; to establish or fix firmly in someone's mind.
Example
The event left an indelible imprint on the city's history.
B2 adjective /ɪmˈprɒp.ər/

Improper

Meaning
inappropriate; incorrect; not suitable
Example
It would be improper to discuss personal matters in a business meeting.
C1 verb /ɪnˈfjʊərieɪt/

infuriate

Meaning
To make someone extremely angry.
Example
His careless remarks infuriated the entire team.
C1 verb /ˈɪrɪˌɡeɪt/

irrigate

Meaning
to supply water to land or crops; to wash out a wound with water
Example
Farmers irrigate their fields during dry seasons.
C1 adjective /ɪˈmeʒərəbəl/

Immeasurable

Meaning
too large or extensive to measure; boundless
Example
The immeasurable love of a mother knows no bounds.
C2 adjective /ˌaɪsəʊˈθɜːrməl/

isothermal

Meaning
Having or maintaining equal or constant temperature.
Example
The experiment was conducted under isothermal conditions.
C1 noun /ˌɪntərˈdʒɛkʃən/

interjection

Meaning
a word or phrase used to express sudden emotion or reaction, often standing alone
Example
Words like 'wow' and 'ouch' are common interjections in English.
C1 adjective /ɪˈnuːmərəbəl/

Innumerable

Meaning
too many to be counted; countless; infinite in number
Example
There are innumerable stars in the night sky that we cannot see with our naked eyes.
C1 noun /ˈɪnkjʊˌbeɪtər/

incubator

Meaning
a device or environment that provides suitable conditions for eggs, cells, or infants to develop
Example
The premature baby was placed in an incubator for care.
B2 verb /ɪnˈʃʊər/

insure

Meaning
to provide insurance; to make certain
Example
I need to insure my new car.
C2 adjective /ɪnˈɛstɪməbl/

inestimable

Meaning
Too great or valuable to be measured or estimated.
Example
Her contribution to the project was of inestimable value.
B1 verb /ɪnˈvɑːlv/

involve

Meaning
to include as a necessary part, or to engage someone in an activity
Example
The project will involve several departments working together.
C1 adjective /ˈɪnərmoʊst/

Innermost

Meaning
most private and secret; deepest; most personal
Example
She shared her innermost feelings with her closest friend.
C1 noun /ˌɪnsɪɡˈnɪfɪkəns/

insignificance

Meaning
The quality of being unimportant or trivial.
Example
He felt a sense of insignificance in the vast universe.
B2 noun /ˌɪm.ɪˈteɪ.ʃən/

Imitation

Meaning
the action of using someone or something as a model; a copy of something original
Example
His imitation of the famous actor was so good that everyone burst into laughter.
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.
C2 noun /ˈɪrɪɡənt/

irrigant

Meaning
A liquid used for irrigation, especially in medical or agricultural contexts.
Example
The doctor used a sterile irrigant during the procedure.