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filth
[filth 词源字典]
filth:
see
foul
[filth etymology, filth origin, 英语词源]
filth (n.)
Old English
fylð
"uncleanness, impurity, foulness," from Proto-Germanic
*fulitho
(cognates: Old Saxon
fulitha
"foulness, filth," Dutch
vuilte
, Old High German
fulida
), noun derivative of
*fulo-
"foul" (see
foul
(adj.)). A classic case of
i-mutation
.