Etymology
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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.

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chuckle (n.)

"a sly, suppressed laugh," 1754, from chuckle (v.).

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chucklehead (n.)

also chuckle-head, "blockhead, dolt," 1731, with head (n.), the first element perhaps from chuck (n.1) "piece of wood" (compare blockhead). Related: Chuckle-headed.

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chortle (v.)

coined 1871 by Lewis Carroll in "Through the Looking Glass," perhaps from chuckle and snort. Related: Chortled; chortling. As a noun, from 1903.

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