indecent

Things that are indecent are obscene, indelicate, or offensive in some way. If you run around the mall naked, you’ll get in trouble for indecent exposure!

Indecent describes things that are not decent — the prefix -in often means “not,” like how independent means “not dependent.” Decent things are morally sound, so indecent things are offensive. Swearing is considered indecent. Indecent often means rude. A joke might go over well with your friends but is considered indecent when told to a teacher. Not everyone will agree on what’s indecent, but we all agree that you should keep your clothes on at the mall.

Definitions of indecent
1

adj not in keeping with accepted standards of what is right or proper in polite society

“was buried with indecent haste”
Synonyms:
indecorous, unbecoming, uncomely, unseemly, untoward
improper
not suitable or right or appropriate

adj offensive to good taste especially in sexual matters

“an earthy but not indecent story”
“an indecent gesture”
Synonyms:
dirty
(of behavior or especially language) characterized by obscenity or indecency
crude, earthy, gross, vulgar
conspicuously and tastelessly indecent
Hollywood
flashy and vulgar
indelicate
verging on the indecent
obscene
designed to incite to indecency or lust
suggestive
tending to suggest something improper or indecent
indecorous, indelicate
lacking propriety and good taste in manners and conduct
improper
not suitable or right or appropriate
Antonyms:
decent
conforming to conventions of sexual behavior
clean, unobjectionable
(of behavior or especially language) free from objectionable elements; fit for all observers
decorous
characterized by propriety and dignity and good taste in manners and conduct
proper
marked by suitability or rightness or appropriateness
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adj offending against sexual mores in conduct or appearance

“a bathing suit considered indecent by local standards”
Synonyms:
immodest
offending against sexual mores in conduct or appearance