crumble (v.)youdaoicibaDictYouDict[crumble 词源字典]
late 15c., kremelen, from Old English *crymelan, presumed frequentative of gecrymman "to break into crumbs," from cruma (see crumb). The -b- is 16c., probably on analogy of French-derived words like humble, where it belongs, or by influence of crumb. Related: Crumbled; crumbling.[crumble etymology, crumble origin, 英语词源]
putrid (adj.)youdaoicibaDictYouDict
early 15c., from Latin putridus, from putrere "to rot," from putris "rotten, crumbling," related to putere "to stink," from PIE root *pu- (2) "to rot, stink" (see pus). First in reference to putrid fever, an old name for typhus (also known in Middle English as putrida). Related: Putrification.