Chuckle
来自Big Physics
late 16th century (in the sense ‘laugh convulsively’): from chuck meaning ‘to cluck’ in late Middle English.
wiktionary
From chuck + -le.
Perhaps from chock(“a log”).
etymonline
chuckle (v.)
1590s, "to laugh loudly," frequentative of Middle English chukken "make a clucking noise" (late 14c.), of imitative origin. Meaning shifted to "laugh in a suppressed or covert way, express inward satisfaction by subdued laughter" by 1803. Related: Chuckled; chuckling.
chuckle (n.)
"a sly, suppressed laugh," 1754, from chuckle (v.).
