cadence (n.)youdaoicibaDictYouDict[cadence 词源字典]
late 14c., "flow of rhythm in verse or music," from Middle French cadence, from Old Italian cadenza "conclusion of a movement in music," literally "a falling," from Vulgar Latin *cadentia, from neuter plural of Latin cadens, present participle of cadere "to fall" (see case (n.1)). In 16c., sometimes used literally for "an act of falling." A doublet of chance (n.).[cadence etymology, cadence origin, 英语词源]