racketyoudaoicibaDictYouDict[racket 词源字典]
racket: Racket for playing tennis [16] and racket ‘noise’ [16] are unrelated words. The former was borrowed from French raquette, which originally meant ‘palm of the hand’. This goes back via Italian racchetta to Arabic rāhat, a variant of rāha ‘palm of the hand’. The origins of racket ‘noise’ are not known, although the probability is that it started life as a verbal imitation of an uproar.
[racket etymology, racket origin, 英语词源]
racket (n.1)youdaoicibaDictYouDict
"loud noise," 1560s, perhaps imitative. Klein compares Gaelic racaid "noise." Meaning "dishonest activity" (1785) is perhaps from racquet, via notion of "game," reinforced by rack-rent "extortionate rent" (1590s), from rack (n.1). But it might as well be an extended sense of "loud noise" by way of "noise or disturbance made to distract a pick-pocket's victim."
racket (n.2)youdaoicibaDictYouDict
"handled paddle or netted bat used in tennis, etc.;" see racquet.