sudsyoudaoicibaDictYouDict[suds 词源字典]
suds: [16] Suds was probably borrowed from Middle Dutch sudse ‘marsh, swamp’ (it was used in the East Anglian dialect for ‘muddy swamp water’ or ‘flood water’, and probably the notion of scum or flotsam on such water led on to ‘floating bubbles, lather’ – first recorded at the end of the 15th century). The word’s ultimate source is no doubt the prehistoric Germanic base *suth- ‘boil’, which also produced English seethe and sodden.
=> seethe, sodden[suds etymology, suds origin, 英语词源]
suds (n.)youdaoicibaDictYouDict
1540s, "dregs, leavings, muck," especially in East Anglia, "ooze left by flood" (according to OED this may be the original sense), perhaps borrowed from Middle Dutch sudse "marsh, bog," or related words in Frisian and Low German, cognate with Old English soden "boiled," from Proto-Germanic *suth-, from PIE *seut- "to seethe, boil" (see seethe). Meaning "soapy water" dates from 1580s; slang meaning "beer" first attested 1904. Related: Sudsy.