Improper

//ɪmˈpɹɒp.ə//

Synonyms for "improper" (296 found)

Ranked by relevance and common usage.

Closest matches (60)

Strong matches (88)

gnominious graceless gross hardly the thing harsh heinous ignominious ill ill-adapted ill-advised ill-assorted ill-chosen ill-considered ill-fitted ill-matched ill-seasoned ill-sorted ill-suited ill-timed illegal

Show 66 more words

Adjective(2 words)

illicit insensitive

Related words (148)

Show 120 more words

out of phase out of place out of proportion out of season out of time out of tune out of way out-of-line outlandish outrageous pale peccant perverse place premature profane rank reprehensible reprobate ridiculous risque rough rowdy rowdyish rude ruffianly sacrilegious sassy scandalous sexy shameful shameless sinful sinister slipshod slovenly solecism solecistic spicy suggestive tactless tasteless terrible terroristic too late too soon unacceptable unacceptableness unadapted unapt unbecomingness unbefitting unbehaving unbeseeming uncalled-for unceremonious uncomely uncourtly uncouth undecorous undesirable undignified undue uneuphonious unfavorable unfelicitous unfit unfitted unfitting unforgivable unfortunate ungenteel ungodly ungraceful ungrammatic unhandy unhappy unhealthy unkind unlawful unlucky unmeet unmeetness unnatural unpardonable unpleasant unpolished unprofessional unprofitable unpropitious unqualified unready unreasonable unrefined unrighteous unripe unscrupulous unseasonable unseemliness unseemly unskillful unspeakable unsuitable unsuited untasteful untimely untoward untrue unwarranted unwise unworthy vernacularism vicious vile villainous vulgar vulgarism wicked wrong wrongful

Adjective(5 words)

rantipole unethical unmannerly unproper unwarrantable

Adjective(3 words)

unconventional unlawful wrong

Related word relations

OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.

6 relation types

Antonyms

1 entries

proper

Synonyms

3 entries

inadequate inappropriate unconventional

derived

14 entries

improper divisor improper face improper fit improper fraction improper integral improper motion improper node improper noun improper orthogonal transformation improper rotation improper time improper use improper workmanship improperness

derived from

1 entries

improbity

related to

24 entries

appropriate circumstance consistent conventional erroneous fact immodest improper fraction improperly in keeping with inaccurate inappropriate inapt incorrect indecent indecorous

Showing 16 of 24 words.

similar

18 entries

inappropriate incorrect indecent indecorous indelicate irregular out of the way out of way out-of-the-way unbecoming uncomely unfit unseemly

Showing 16 of 18 words.

Translations

94 translations across 25 languages.

Armenian

2 entries

անպիտան adj (not in keeping with conventional mores or good manners)
անվայել adj (not in keeping with conventional mores or good manners)

Basque

1 entries

ezegoki adj (unsuitable to needs or circumstances)

Bulgarian

4 entries

неподходящ adj (unsuitable to needs or circumstances)
неправилен adj (Not according to facts)
неприличен adj (not in keeping with conventional mores or good manners)
непристоен adj (not in keeping with conventional mores or good manners)

Catalan

3 entries

impropi adj (unsuitable to needs or circumstances)
impropi adj (not in keeping with conventional mores or good manners)
impropi adj (Not properly named)

Danish

2 entries

uanstændig adj (not in keeping with conventional mores or good manners)
upassende adj (not in keeping with conventional mores or good manners)

Dutch

4 entries

foutief adj (Not according to facts)
foutief adj (Not consistent with established facts)
inconsistent adj (Not consistent with established facts)
misplaatst adj (not in keeping with conventional mores or good manners)

Finnish

4 entries

sopimaton adj (unsuitable to needs or circumstances)
sopimaton adj (not in keeping with conventional mores or good manners)
säädytön adj (not in keeping with conventional mores or good manners)
väärä adj (Not according to facts)

French

4 entries

grossier adj (not in keeping with conventional mores or good manners)
impropre adj (unsuitable to needs or circumstances)
impropre adj (not in keeping with conventional mores or good manners)
impropre adj (Not properly named)

German

2 entries

unhöflich adj (not in keeping with conventional mores or good manners)
unpassend adj (unsuitable to needs or circumstances)

Greek

2 entries

ακατάλληλος adj (unsuitable to needs or circumstances)
ανάρμοστος adj (not in keeping with conventional mores or good manners)

Hindi

2 entries

अनुचित adj (unsuitable to needs or circumstances)
अशोभनीय adj (not in keeping with conventional mores or good manners)

Irish

1 entries

aindílis adj (not in keeping with conventional mores or good manners)

Japanese

4 entries

そぐわない adj (unsuitable to needs or circumstances)
そぐわない adj (Not properly named)
不適切な adj (unsuitable to needs or circumstances)
不適切な adj (Not properly named)

Latin

2 entries

improprius adj (unsuitable to needs or circumstances)
indecens adj (not in keeping with conventional mores or good manners)

Norwegian

4 entries

feilaktig adj (Not according to facts)
feilaktig adj (Not properly named)
uanstendig adj (not in keeping with conventional mores or good manners)
uegnet adj (unsuitable to needs or circumstances)

Portuguese

4 entries

impróprio adj (unsuitable to needs or circumstances)
impróprio adj (not in keeping with conventional mores or good manners)
impróprio adj (Not according to facts)
impróprio adj (Not consistent with established facts)

Romanian

1 entries

impropriu adj (unsuitable to needs or circumstances)

Russian

4 entries

ло́жный adj (Not according to facts)
некорре́ктный adj (not in keeping with conventional mores or good manners)
ненадлежа́щий adj (unsuitable to needs or circumstances)
неподходя́щий adj (unsuitable to needs or circumstances)

Sanskrit

1 entries

अकार्य adj (not in keeping with conventional mores or good manners)

Slovak

4 entries

nesprávny adj (Not according to facts)
nesprávny adj (Not consistent with established facts)
nevhodný adj (unsuitable to needs or circumstances)
nevhodný adj (not in keeping with conventional mores or good manners)

Slovene

1 entries

neprimeren adj (unsuitable to needs or circumstances)

Spanish

3 entries

impropio adj (not in keeping with conventional mores or good manners)
improprio adj (not in keeping with conventional mores or good manners)
indebido adj (not in keeping with conventional mores or good manners)

Tagalog

2 entries

di-angkap adj (not in keeping with conventional mores or good manners)
di-angkop adj (unsuitable to needs or circumstances)

Turkish

4 entries

uygunsuz adj (unsuitable to needs or circumstances)
uygunsuz adj (not in keeping with conventional mores or good manners)
yakışıksız adj (not in keeping with conventional mores or good manners)
yanlış adj (Not according to facts)

Ukrainian

4 entries

невідпові́дний adj (unsuitable to needs or circumstances)
некоре́ктний adj (not in keeping with conventional mores or good manners)
ненале́жний adj (unsuitable to needs or circumstances)
непристо́йний adj (not in keeping with conventional mores or good manners)

Sample sentences

14 total sentences available.

Tatoeba + Wiktionary

This unexpected malfunctioning of the system was caused by improper wiring.

Source: tatoeba (53483)

It is improper to impose sanctions upon the union.

Source: tatoeba (273956)

In present day Japan, "alchemy" is only used metaphorically; to refer to improper means of making money by politicians or religious hucksters with no morals or shame.

Source: tatoeba (327529)

With improper use, he damaged the machine.

Source: tatoeba (619547)

Showing 4 of 14 available sentences.

More for "improper"

Meaning Antonyms Sentences Word Type

Keep exploring

Compare antonyms Use in sentences Read the blog

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.