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непристойный adj. stresses
gen.	obscene; indecent; bawdy; beastly; blue; low; improper; scurrilous; ribald; coarse; disorderly; filthy; graceless; greasy; gross; indecorous; lewd; nasty; racy; salacious; salt; salty; smutty; off colour; ithyphallic; misbecoming; Rabelaisian; thersitical; unchaste; unrepeatable; Anglo-Saxon; gamy; harlot; unclean; X-rated; scurril; scurrile; taboo (о слове); tabu (о слове); tapu (о слове); scatological (Anglophile); fescennine (matchin); offensive (Beloshapkina); embarrassing (DC); X rated; paw paw; broad; cynical; naughty; profane; abusive (язык, речь); inappropriate (Beloshapkina); vulgar (Andrey Truhachev); scabrous (HSE-student); raunchy; risky (в этом значении произносится как riskay); coltish; unseemly; foul; sexually-oriented (там же Moscowtran); risqué (VLZ_58); fat; fulsome; licentious; luscious; unbecoming; unbeseeming; unfitting; unmeet; unsuitable
Игорь Миг	of a salacious nature; beyond the pale
book.	sexually explicit (igisheva)
brit.	fruity (of a remark) humorous in a slightly shocking way: He was well known for his fruity jokes. cambridge.org)
euph.	sultry (о языке, рассказе и т.п.)
euph., obs.	paw-paw
humor.	feelthy (Anglophile)
inf.	grubby (a grubby joke VLZ_58)
law	indecency (Право международной торговли On-Line)
Makarov.	impure
obs.	dedecorous; disharmonious; dishonest; insuitable; ribaldrous; unsuiting
rel., christ.	base
slang	nubbly; dirty; purple; rough; trashy (Interex); down-and-dirty (VLZ_58)
uncom.	uncomely
vulg.	adult; anatomical; barnyard; choice; juicy; page three (в газете Sun на третьей странице помещаются фотографии обнаженных женщин); rare; raw; rich; ripe; sad; shady; smudgy; spicy; strong; sultry; swift; tsk-tsk; wanton; warm; wide

непристойный: 206 phrases in 25 subjects

American usage, not spelling	7
Business	4
Clothing	1
Construction	1
Criminal law	1
Diplomacy	1
Disapproving	1
Electronics	1
Figure of speech	1
General	81
Informal	6
Japanese language	1
Law	28
Librarianship	8
Linguistics	3
Literature	1
Makarov	15
Mass media	1
Microsoft	1
Psychology	2
Religion	2
Security systems	1
Slang	16
Uncommon / rare	1
Vulgar	21