chuckle (v.)youdaoicibaDictYouDict[chuckle 词源字典]
1590s, frequentative of Middle English chukken "make a clucking noise" (late 14c.), of echoic origin. It originally meant "noisy laughter." Related: Chuckled; chuckling.[chuckle etymology, chuckle origin, 英语词源]
chuckle (n.)youdaoicibaDictYouDict
1754, from chuckle (v.).