mash (n.)youdaoicibaDictYouDict[mash 词源字典]
"soft mixture," late Old English *masc (in masc-wyrt "mash-wort, infused malt"), from Proto-Germanic *maisk- (cognates: Swedish mäsk "grains for pigs," German Maisch "crushed grapes, infused malt," Old English meox "dung, filth"), from PIE *meik- "to mix" (see mix (v.)). Originally a word in brewing; general sense of "anything reduced to a soft pulpy consistency" is recorded from 1590s, as is the figurative sense "confused mixture, muddle." Short for mashed potatoes it is attested from 1904.[mash etymology, mash origin, 英语词源]
mash (v.)youdaoicibaDictYouDict
Old English mæscan, "to mix with hot water," from same root as mash (n.). Meaning "to beat into a soft mass" is mid-13c. Related: Mashed; mashing. For romantic sense, see masher.