CEFR Level
the state of being unwilling or unable to believe something
"She looked at him with incredulity after hearing the strange story."
a crust or hard coating formed on the surface of something
"The old pipes were blocked due to heavy incrustation of minerals."
An oppressive or nightmarish burden; in folklore, an evil spirit that lies upon sleeping people.
"Debt became an incubus that weighed heavily on the family."
To teach or instill an idea, attitude, or habit persistently.
"Parents try to inculcate good manners in their children."
To blame or accuse someone of wrongdoing.
"The evidence seemed to inculpate the suspect in the crime."
Not in keeping with good taste and propriety; improper.
"His indecorous behavior shocked the audience."
persisting tirelessly; incapable of being fatigued
"Her indefatigable spirit kept the team motivated during the long project."
A space left at the beginning of a line of text; a notch or deep recess on a surface.
"The teacher asked the students to use proper indentation in their essays."
Not exactly known, defined, or established; vague or uncertain.
"The project was delayed for an indeterminate amount of time."
Something that indicates or points to a fact or condition.
"High fever is often an indicant of infection."
a state of extreme poverty or destitution
"The charity was founded to help people living in indigence."
lacking the necessities of life due to poverty; very poor
"The hospital offers free care to indigent patients."
difficult or impossible to digest; hard to accept or understand
"The report was so long and detailed that it became almost indigestible."
Impossible or difficult to see, notice, or distinguish.
"The difference between the two shades was almost indiscernible."
Unable to be destroyed, broken, or dissolved.
"Marriage was once considered an indissoluble bond."
To write or compose (literary or formal works).
"The poet indited a heartfelt sonnet."
Not able to be turned aside or diverted.
"The judge's indivertible attention was on the case."
To teach someone to fully accept a set of beliefs or ideas without question.
"The regime tried to indoctrinate the youth with propaganda."
Avoidance of activity or exertion; laziness.
"His indolence kept him from finishing the project on time."
Wanting to avoid activity or exertion; lazy.
"The indolent cat slept in the sun all afternoon."
Impossible to subdue or defeat.
"She had an indomitable spirit that inspired everyone."
Impossible to doubt; unquestionable.
"It is indubitable that hard work leads to success."
Without a doubt; certainly.
"She is indubitably the best candidate for the job."
To harden or make something physically or emotionally tough.
"Years of hardship indurated his spirit."
the state of being drunk or intoxicated
"His frequent inebriety led to the loss of his job."
too great, extreme, or beautiful to be expressed in words
"The beauty of the sunset was ineffable."
Not producing any or the desired effect; ineffective.
"The treatment was inefficacious in curing the disease."
Impossible to avoid or escape; inevitable.
"Death is an ineluctable part of human existence."
Not fair or just; lacking in fairness or equality.
"The distribution of resources was inequitable among the workers."
the belief or quality of being free from error; absolute correctness
"Some religious groups strongly affirm the inerrancy of their sacred texts."
not necessary or important; not essential
"The report removes all inessential details to stay focused."
Too great or valuable to be measured or estimated.
"Her contribution to the project was of inestimable value."
Impossible to stop or prevent; relentless.
"The inexorable rise of technology is changing every aspect of life."
This appears to be a corrupted or concatenated form; interpreted as 'inexorable army' — an unstoppable or relentless force.
"The rebels feared the inexorable army approaching their stronghold."
Not advisable, suitable, or practical in the circumstances.
"It would be inexpedient to invest without proper research."
not skilled or experienced; lacking expertise
"The inexpert handling of the machine caused several mistakes."
Too strong or extreme to be expressed in words.
"She felt inexpressible joy at the news of her success."
Not capable of being stretched or extended.
"This rope is made of an inextensible material."
Impossible to separate or escape from.
"The two friends shared an inextricable bond."
the state of being well known for some bad quality or deed
"His name will live in infamy for the crimes he committed."
characteristic of an infant; childish
"His infantile behavior embarrassed everyone at the meeting."
to inspire with an intense but short-lived passion or admiration
"He was infatuated with her beauty."
Not possible to do easily or conveniently; impracticable.
"Restoring the forest may become infeasible if destruction continues."
not suitable or well chosen; awkward or unfortunate
"His infelicitous remark ruined the atmosphere of the meeting."
relating to hell; extremely troublesome or annoying
"The workers complained about the infernal noise from the construction site."
a person who does not believe in a particular religion or faith
"In medieval times, people often called non-Christians infidels."
Extremely small in size or amount; so tiny as to be almost negligible.
"The error was so infinitesimal that it didn’t affect the results."
