demulcent (adj.)youdaoicibaDictYouDict[demulcent 词源字典]
1732, from Latin demulcentem (nominative demulcens), present participle of demulcere "to stroke down, soothingly pet," from de- (see de-) + mulcere "to soothe."[demulcent etymology, demulcent origin, 英语词源]