impart
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C1 verb /ɪmˈpɑːrt/

impart

Meaning
to make information known; to bestow or communicate
Example
The teacher imparted valuable knowledge to her students.
C2 verb /ɪˈmjʊər/

immure

Meaning
to confine or enclose someone against their will
Example
The prisoner was immured in a dark cell.
C2 adjective /ˌɪnfɪnɪˈtɛsɪməl/

infinitesimal

Meaning
Extremely small in size or amount; so tiny as to be almost negligible.
Example
The error was so infinitesimal that it didn’t affect the results.
C1 adjective /ɪmˈpɜːmiəbl/

impermeable

Meaning
Not allowing fluid or gas to pass through.
Example
The container is made of impermeable plastic.
C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

Meaning
relating to substances that are not derived from living organisms; lacking organic structure or growth
Example
Inorganic compounds are commonly studied in chemistry labs.
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.
A1 preposition /ˈɪntuː/

into

Meaning
expressing movement or direction to the inside of something
Example
She walked into the room quietly.
A1 pronoun /ɪt/

it

Meaning
used to refer to a thing, animal, or idea previously mentioned or easily identified
Example
It is raining outside.
C2 adjective /ɪnˈɛksərəbl/

inexorable

Meaning
Impossible to stop or prevent; relentless.
Example
The inexorable rise of technology is changing every aspect of life.
C2 verb /ɪnˈtɜːr/

inter

Meaning
To bury a dead body in the ground.
Example
They decided to inter the soldier with full honors.
B2 noun /ˈɪn.flu.ən.sər/

Influencer

Meaning
A person with the ability to influence potential buyers of a product or service by promoting or recommending the items on social media.
Example
Social media influencers shape consumer preferences.
B1 adverb /ɪnˈkriːsɪŋli/

increasingly

Meaning
more and more over time
Example
People are increasingly concerned about climate change.
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 adjective /ɪnˈdetɪd/

Indebted

Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
C1 noun /ɪnˈdaɪtmənt/

indictment

Meaning
a formal charge or accusation of a serious crime
Example
The indictment accused the company of multiple violations.
A2 verb /ɪˈmædʒɪn/

imagine

Meaning
to form a mental image of; to believe something unreal to be true
Example
Can you imagine living in a different country?
B2 noun /ˈɪɡ.nər.əns/

Ignorance

Meaning
lack of knowledge or information; the state of being uninformed about something
Example
His ignorance about basic computer skills made it difficult for him to find a job.
C1 adjective /ɪˈlʌstriəs/

illustrious

Meaning
Well known, respected, and admired for past achievements.
Example
She had an illustrious career in medicine.
C2 noun /ˌɪnkænˈdɛsəns/

incandescence

Meaning
the emission of light from a hot object; brilliance
Example
The incandescence of the candle filled the dark room.
B1 adjective ˈɪnəveɪtɪv

innovative

Meaning
Featuring new methods; advanced and original
Example
Innovative strategies are required to combat pollution.
C2 adjective /ɪnˈskruːtəbl̩/

inscrutable

Meaning
impossible to understand or interpret
Example
His inscrutable expression made it hard to know what he was thinking.
C2 noun /aɪˈoʊtə/

iota

Meaning
An extremely small amount.
Example
He did not show an iota of fear.
C1 verb /ɪmˈpɛl/

impel

Meaning
to drive, force, or urge someone to do something
Example
Her curiosity impelled her to open the mysterious box.
C1 noun ˌɪnfrəˈstrʌktʃərəl dɪˈveləpmənt

infrastructural development

Meaning
The process of building and improving the basic physical and organizational structures and facilities needed for the operation of a society or enterprise.
Example
Infrastructural development is necessary for efficient recycling.
B2 adjective /ˌɪnəˈproʊpriət/

inappropriate

Meaning
not suitable or proper in the circumstances
Example
It was inappropriate to talk loudly in the library.
C2 noun /ɪnˈtɒksɪkənt/

intoxicant

Meaning
a substance, especially alcohol or a drug, that causes intoxication
Example
Alcohol is the most commonly used intoxicant in many cultures.
B2 adjective /ˌɪnsɪɡˈnɪfɪkənt/

insignificant

Meaning
Too small or unimportant to be worth considering.
Example
The cost was so insignificant that nobody noticed it.
A2 adverb /ˌɪnˈdɔːrz/

indoors

Meaning
inside a building; within an enclosed space
Example
Because of the rain, everyone stayed indoors.
C2 noun /ˈaɪ.səˌbɑːr/

isobar

Meaning
A line on a weather map connecting points of equal atmospheric pressure.
Example
The meteorologist explained how isobars indicate wind speed and direction.
C1 verb ɪˈmɜːrs

immerse

Meaning
To involve oneself deeply in a particular activity or interest; to surround completely.
Example
Immerse yourself in the new language.
C1 noun /ɪnˈvɜːrʒən/

inversion

Meaning
A reversal of the normal order, position, or relationship.
Example
In poetry, inversion is often used to create emphasis.
C2 noun /ˈɪntərˌloʊpər/

interloper

Meaning
A person who becomes involved in a situation or place where they are not wanted.
Example
He felt like an interloper at the private family gathering.
B1 noun /ˌɪntərˈækʃən/

interaction

Meaning
The process of people or things acting upon or influencing each other.
Example
The teacher encouraged more interaction between students.
B1 noun /ˈɪnkʌm/

income

Meaning
money received for work or through investments
Example
His monthly income is enough to support his family.
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 adjective /aɪˈtɪnərənt/

itinerant

Meaning
Traveling from place to place, especially for work or duty.
Example
The itinerant teacher moved from village to village to educate children.
C2 adjective /ɪnˈkɒnstənt/

inconstant

Meaning
frequently changing; not consistent or dependable
Example
His inconstant moods made it difficult to work with him.
A2 adjective /ˈɪntrəstɪd/

interested

Meaning
Showing curiosity or concern about something.
Example
She is very interested in learning new languages.
A2 adjective /ɪnˈtɛlɪdʒənt/

intelligent

Meaning
Having or showing high mental capacity, quick to learn and understand.
Example
She is one of the most intelligent students in the class.
C1 adjective /ɪnˈkɒmp(ə)rəbl/

incomparable

Meaning
Without an equal in quality or excellence; matchless.
Example
The view from the mountain was incomparable.
C2 adjective /ɪˈmɪsəbl/

immiscible

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

Idealistic

Meaning
pursuing high principles or ideals; unrealistically optimistic
Example
She has an idealistic view of changing the world.
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.
B1 noun ɪnˈven.ʃən

invention

Meaning
The action of inventing something, typically a process or device.
Example
The invention revolutionized communication.
A2 verb /ɪnˈvaɪt/

invite

Meaning
to ask someone to come to an event or to do something
Example
We should invite all our friends to the party.
C1 adjective /ɪnˈtɜːrmənəbl/

interminable

Meaning
Seemingly endless; having no apparent end.
Example
The meeting felt interminable and exhausting.
C1 verb /aɪˈdiː.ə.laɪz/

idealize

Meaning
To regard or represent something as perfect or better than it really is.
Example
Children often idealize their parents.
B2 noun ɪnˈfleɪʃən

inflation

Meaning
A general increase in prices and fall in the purchasing value of money.
Example
Inflation erodes the purchasing power of consumers.
B2 noun /ˌɪntəˈrʌpʃən/

interruption

Meaning
the act of stopping or breaking the continuity of something; a pause caused by an external action
Example
The meeting was delayed due to an unexpected interruption.
C2 verb /ɪnˈveɪɡəl/

inveigle

Meaning
To persuade someone to do something by deception or flattery.
Example
She inveigled him into signing the contract.
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.
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.
C1 adjective /ɪnˈflɛksəbl/

inflexible

Meaning
Not able to bend or change; unwilling to change ideas or behavior.
Example
His inflexible attitude made negotiations difficult.
C2 verb /ˈɪmprɛɡneɪt/

impregnate

Meaning
To make pregnant; to fill or saturate with something.
Example
The scientist used a method to impregnate the material with resin.
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.
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 noun /ˌɪn.ʌnˈdeɪ.ʃən/

inundation

Meaning
The act of flooding or overwhelming with water or things.
Example
The town suffered from a severe inundation after the heavy rains.
C1 adjective /ɪˈræʃənəl/

irrational

Meaning
not logical or reasonable; lacking clear thought
Example
His fear of the dark was completely irrational.
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.
C2 adjective /ɪmˈpɑːlɪtɪk/

impolitic

Meaning
Unwise or imprudent; not showing good judgment.
Example
It would be impolitic to criticize them openly.
C2 noun /ɪˈnænɪti/

inanity

Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
C2 verb /ɪnˈsɪnəˌreɪt/

incinerate

Meaning
to burn something completely until it is reduced to ashes
Example
The city decided to incinerate the medical waste for safety.
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.
C2 noun /ˌɪnjuːˈɛndəʊ/

innuendo

Meaning
An allusive or oblique remark or hint, typically a suggestive or disparaging one.
Example
The manager's innuendo was directed towards his competitor.
C1 noun /ɪnˈfjuːʒən/

infusion

Meaning
the act of introducing something into another; a drink made by steeping leaves or herbs in liquid
Example
She prepared a calming infusion of chamomile tea.
A2 verb /ɪɡˈnɔːr/

ignore

Meaning
to refuse to take notice of; to disregard intentionally
Example
She decided to ignore the rude comments.
C2 verb /ɪnˈhjuːm/

inhume

Meaning
to bury a dead body in the ground
Example
They inhumed the warrior with full honors.
B2 noun /ˈɪntərvəl/

interval

Meaning
a period of time between two events or points; a pause or break in activity
Example
There was a short interval between the two performances.
B1 noun /ˈɪnstəns/

instance

Meaning
An example or single occurrence of something.
Example
This is just one instance of his generosity.
B2 adjective /ɪˈreɡjələr/

irregular

Meaning
not even or consistent in shape, pattern, time, or behavior; not following normal rules
Example
His attendance at work has been irregular this month.
B2 adjective /ˌɪnfluˈenʃəl/

Influential

Meaning
having great influence on someone or something; powerful; persuasive
Example
She is an influential leader in the community.
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 /ˈɪnlɛt/

inlet

Meaning
A small arm of the sea, a lake, or a river; an opening or passage for entry.
Example
The boat entered a narrow inlet along the coast.
C2 adjective /ˌɪnkənˈsɪdərəbl/

inconsiderable

Meaning
Too small or unimportant to be worth considering.
Example
The donation was not inconsiderable, though smaller than expected.
C2 adjective /ˌɪntərˈniːsaɪn/

internecine

Meaning
Relating to conflict within a group, often causing mutual destruction.
Example
The internecine conflict weakened the organization from within.
C2 noun /ɪnˈtɛstəsi/

intestacy

Meaning
The condition of dying without having made a valid will.
Example
His estate was divided according to the laws of intestacy.
B1 noun /ɪmˈprɛʃən/

impression

Meaning
an idea, feeling, or opinion about something or someone
Example
The book gave me a good first impression.
B2 adjective /ɪnˈtɒlərənt/

intolerant

Meaning
unwilling to accept or respect beliefs or behavior different from one's own
Example
He is intolerant of any opinion that differs from his own.
C2 noun /ˌɪnkrʌˈsteɪʃən/

incrustation

Meaning
a crust or hard coating formed on the surface of something
Example
The old pipes were blocked due to heavy incrustation of minerals.
A2 noun /ɪmˈpɔːtəns/

importance

Meaning
The quality or state of being important; consequence or significance.
Example
The importance of time management cannot be overstated.
C1 verb /ɪnˈkɑːrsəreɪt/

incarcerate

Meaning
to imprison or confine someone
Example
The authorities incarcerated the criminal after the trial.
C1 adjective /ˌɪndɪˈvɪzəbl/

indivisible

Meaning
Not able to be divided or separated.
Example
The country's unity was indivisible despite differences.
C1 verb /ɪnˈdʌkt/

induct

Meaning
to formally admit someone into a position, organization, or office
Example
She was inducted into the university's honor society.
B2 verb /ɪnˈhæbɪt/

inhabit

Meaning
to live in; to occupy as a dwelling
Example
Many animals inhabit the forest.
C1 noun ɪnˈdɪdʒɪnəs trəˈdɪʃənz

Indigenous Traditions

Meaning
Cultural practices, beliefs, and customs that have been passed down through generations among native peoples.
Example
Indigenous traditions in the Chittagong Hill Tracts are unique.
C1 verb /ɪmˈpɒvərɪʃ/

impoverish

Meaning
To make someone poor or reduce the quality or richness of something.
Example
The long war impoverished the entire nation.
C2 adjective /ˌɪnkəmˈprɛsəbl/

incompressible

Meaning
Not able to be pressed or squeezed into a smaller space.
Example
Liquids are generally considered incompressible.
C2 adjective /ˌɪməˈmɔːriəl/

immemorial

Meaning
Extending back beyond memory or record; ancient.
Example
The tradition has been followed since time immemorial.
B2 adverb /ˌɪndəˈrɛktli/

indirectly

Meaning
in a way that is not direct; through an intermediate means or influence
Example
The policy affected small businesses indirectly.
B1 noun /ɪnˈtɛnʃən/

intention

Meaning
A plan, aim, or purpose behind an action.
Example
Her intention was to finish the project before the deadline.
B1 noun /ɪnˈstrʌkʃən/

instruction

Meaning
Detailed information telling how something should be done or operated.
Example
Please read the instruction carefully before using the machine.
C2 adjective /ɪmˈplækəbl/

implacable

Meaning
unable to be appeased, calmed, or pacified
Example
The soldiers faced an implacable enemy who refused to surrender.
B1 verb /ɪnˈstɔːl/

install

Meaning
To place or fix equipment or software so it is ready for use.
Example
He installed the new software on his computer.
C1 noun /ˌɪntərˈmɪʃən/

intermission

Meaning
A pause or break, especially during a performance or event.
Example
The play had a twenty-minute intermission.
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.
C2 adverb /ˈaɪsɪli/

icily

Meaning
In a very cold, unfriendly, or hostile manner.
Example
She replied icily to his question.
B1 adverb /ɪˈnɪʃəli/

initially

Meaning
At the beginning; at first.
Example
Initially, he refused the offer but later accepted it.
A1 preposition /ɪn ˈfrʌnt əv/

in front of

Meaning
positioned before or ahead of something; facing or located at the forward side of a person or object
Example
She stood in front of the building.
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.
C1 verb /ɪˈluːmɪneɪt/

illuminate

Meaning
To light up or make something clearer.
Example
Streetlights illuminate the road at night.
C2 adjective /ɪmˈpæsɪbəl/

impassible

Meaning
Incapable of suffering or feeling pain (used mainly in theological or philosophical contexts).
Example
Some philosophers argue that God is impassible and cannot experience human emotions.
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.
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.
B2 verb ɪmˈpoʊz

imposes

Meaning
To establish or apply by authority; to force something unwelcome or unfamiliar to be accepted or put in place.
Example
Pollution imposes harmful effects on the environment.
B2 noun /ˌaɪ.səˈleɪ.ʃən/

Isolation

Meaning
the process or fact of isolating or being isolated; separation from other people or things
Example
The patient was kept in isolation to prevent the spread of the infectious disease.
C1 adjective /ˈɪrɪtəbl/

irritable

Meaning
easily annoyed or made angry
Example
She became irritable after working long hours without rest.
C1 adjective /ɪmˈplɔːzəbl/

implausible

Meaning
Not seeming reasonable or probable; unlikely to be true.
Example
The story she told was so implausible that no one believed her.
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 adjective /ˌɪnəˈfɛnsɪv/

inoffensive

Meaning
Not likely to offend or provoke; harmless.
Example
His inoffensive remarks kept the conversation friendly.
C2 noun /ɪˈreɪdiəns/

irradiance

Meaning
the quality of shining brightly; the intensity of light falling on a surface
Example
The irradiance of the sun at noon was overwhelming.
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.
C2 adjective /ˈɪm.pi.əs/

Impious

Meaning
irreligious; lacking reverence for religion; blasphemous
Example
The impious act shocked the religious community.
C2 adjective /ɪnˈvaɪələt/

inviolate

Meaning
free from violation, injury, or desecration; kept safe and untouched
Example
The ancient temple remained inviolate for centuries.
C1 verb /ɪmˈpiːd/

impede

Meaning
To obstruct or hinder the progress or development of something.
Example
Lack of funds can impede business growth.
B2 adjective /ɪˈrɪˌspɑn.sə.bəl/

Irresponsible

Meaning
lacking a sense of responsibility; careless
Example
It was irresponsible of him to leave without telling anyone.
C2 adjective /ɪnˈsɪpiənt/

incipient

Meaning
in an initial stage; beginning to develop
Example
The incipient storm made the sky turn dark and heavy.
C1 adjective /ˌɪndɪˈskrɪmɪnət/

indiscriminate

Meaning
Done without careful judgment; random or haphazard.
Example
The indiscriminate use of pesticides harms the environment.
C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

Meaning
The process of forming and developing new ideas or concepts through creative thinking and brainstorming.
Example
The team engaged in ideation sessions to generate new product ideas.
C1 adjective /ɪnˈfɜːm/

infirm

Meaning
Weak, especially due to old age or illness.
Example
The infirm old man needed assistance to walk.
C1 noun /ɪnˈhɛrɪtər/

inheritor

Meaning
a person who receives money, property, or a title when someone dies
Example
She became the inheritor of her family's estate.
C1 adjective ˌɪn.təˈdɪs.ɪ.plɪ.nər.i

interdisciplinary

Meaning
Relating to more than one branch of knowledge.
Example
The interdisciplinary approach in education enhances problem-solving skills.