caprice (n.)youdaoicibaDictYouDict[caprice 词源字典]
"sudden change of mind," 1660s, from French caprice "whim" (16c.), from Italian capriccio "whim," originally "a shivering," possibly from capro "goat," with reference to frisking, from Latin capreolus "wild goat" (see cab). But another theory connects the Italian word with capo "head" + riccio "curl, frizzled," literally "hedgehog" (from Latin ericius). The notion in this case would be of the hair standing on end in horror, hence the person shivering in fear.[caprice etymology, caprice origin, 英语词源]
frisk (v.)youdaoicibaDictYouDict
1510s, "to dance, frolic," from Middle English adjective frisk "lively" (mid-15c.), from Middle French frisque "lively, brisk," in Old French "fresh, new; merry, animated" (13c.), which is possibly from a Germanic source (compare Middle Dutch vrisch "fresh," Old High German frisc "lively;" see fresh (adj.1)). Sense of "pat down in a search" first recorded 1781. Related: Frisked; frisking. As a noun, "a frolic, gambol," from 1520s.