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Antonyms

appreciable, discernible, palpable, perceptible, sensible

im·per·cep·tive adjective : not perceptive

imperf abbreviation imperfect

1imperfect adjective 1 : not perfect esp. by having a fault or a lack

2 : of, relating to, or being a verb tense used to designate a continuing state or an incomplete action esp. in the past

— im·per·fect·ly adverb

Synonyms

bad, defective, faulty—more at FAULTY

2imperfect noun : the imperfect tense; also : a verb form in it

im·per·fec·tion noun 1 : the quality or state of being imperfect

2 : the quality or aspect which makes something incomplete or defective : FAULT, BLEMISH

Synonyms

blemish, defect, deformity, disfigurement, fault, flaw, mark, pockmark, scar—more at BLEMISH

im·pe·ri·al adjective 1 : of, relating to, or befitting an empire or an emperor; also : of or relating to the United Kingdom or to the Commonwealth or British Empire

2 : ROYAL, SOVEREIGN; also : REGAL, IMPERIOUS

3 : of unusual size or excellence

im·pe·ri·al·ism noun : the policy of seeking to extend the power, dominion, or territories of a nation

— im·pe·ri·al·ist noun or adjective

— im·pe·ri·al·is·tic adjective

— im·pe·ri·al·is·ti·cal·ly adverb

im·per·il verb -iled or -illed; -il·ing or -il·ling : to bring into peril : ENDANGER

Synonyms

adventure, compromise, gamble, hazard, jeopardize, menace, risk, venture

im·pe·ri·ous adjective 1 : befitting or characteristic of one of eminent rank or attainments : COMMANDING, LORDLY

2 : marked by arrogant assurance : DOMINEERING

3 : intensely compelling : IMPERATIVE, URGENT

— im·pe·ri·ous·ly adverb

Synonyms

[2] authoritarian, autocratic, bossy, despotic, dictatorial, domineering, masterful, overbearing, peremptory, tyrannical, tyrannous—more at BOSSY

[2] arbitrary, dictatorial, high-handed, peremptory, willful—more at ARBITRARY

[3] acute, critical, dire, imperative, instant, pressing, urgent—more at ACUTE

im·per·ish·able adjective : not perishable or subject to decay

im·per·ma·nent adjective : not permanent

— im·per·ma·nent·ly adverb

Synonyms

interim, provisional, short-term, temporary—more at TEMPORARY

ephemeral, evanescent, flash, fleeting, fugitive, momentary, passing, short-lived, temporary, transient—more at MOMENTARY

im·per·me·able adjective : not permitting passage (as of a fluid) through its substance

im·per·mis·si·ble adjective : not permissible

Synonyms

forbidden, taboo; also intolerable, unacceptable, unbearable, unendurable; illegal, illegitimate, illicit, improper, inappropriate, unauthorized, unlawful, unlicensed, unmentionable; unseemly, unsuitable; objectionable; disallowed, disapproved, discouraged; refused, rejected, revoked, unsanctioned, vetoed; repressed, suppressed; precluded, prevented, stopped; excluded, ruled out, shut out; blocked, hindered, impeded, obstructed

Antonyms

allowable, permissible, permissive, sufferable

im·per·son·al adjective 1 : not referring to any particular person or thing

2 : not involving human emotions

— im·per·son·al·i·ty noun

— im·per·son·al·ly adverb

im·per·son·ate verb -at·ed; -at·ing : to assume or act the character of

— im·per·son·a·tion noun

Synonyms

act, perform, play, portray—more at ACT

masquerade, play, pose; also ape, copy, imitate, mine, mimic, mock, parody, travesty; act, perform, portray

im·per·son·a·tor noun : one that impersonates; especially : an entertainer who impersonates an individual, a type of person, an animal, or an inanimate object

Synonyms

imitator, impressionist, mimic—more at MIMIC

im·per·ti·nence noun : the quality or state of being impertinent; also : an instance of impertinence

Synonyms

brazenness, discourtesy, disrespect, impudence, incivility, insolence, rudeness—more at DISCOURTESY

im·per·ti·nent adjective 1 : IRRELEVANT

2 : not restrained within due or proper bounds

— im·per·ti·nent·ly adverb

Synonyms

arch, bold, brash, brazen, cheeky, cocky, fresh, impudent, insolent, nervy, sassy, saucy