Filth
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 19:36的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=filth+etymology&newwindow=1&hl=en ref] Old English fȳlth ‘rotting matter, rottenness…”的新页面）
Old English fȳlth ‘rotting matter, rottenness’, also ‘corruption, obscenity’, of Germanic origin; related to Dutch vuilte, also to foul.
wiktionary
From Middle English filth, from Old English fȳlþu, from Proto-West Germanic *fūliþu, equivalent to foul + -th.
etymonline
filth (n.)
Old English fylð "uncleanness, impurity, foulness," from Proto-Germanic *fulitho (source also of 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.
