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cachinnatory

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cach⋅in⋅nate

[kak-uh-neyt]
–verb (used without object), -nat⋅ed, -nat⋅ing.
to laugh loudly or immoderately.

Origin:
1815–25; < L cachinnātus (ptp. of cachinnāre to laugh aloud, laugh immoderately), equiv. to cachinn- laugh aloud + -ātus -ate 1


cach⋅in⋅na⋅tion, noun
cach⋅in⋅na⋅tor, noun
cach⋅in⋅na⋅to⋅ry [kak-uh-nuh-tawr-ee, -tohr-ee, kuh-kin-uh-] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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