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smutty (adj.)
[smutty 词源字典]
1590s, "soiled with smut" (of grain); 1660s, "indecent," from
smut
+
-y
(2). Related:
Smuttily
;
smuttiness
.
Smutty-nosed
in ornithology means "having black nostrils."
[smutty etymology, smutty origin, 英语词源]
[smutty 词源字典]