v.
Pronunciation: ' ka-k ə - ˌ n ā t
Function: intransitive verb
Inflected Form: -nat · ed ; -nat · ing
Etymology: Latin cachinnatus, past participle of cachinnare, of imitative origin
Date: 1824
: to laugh loudly or immoderately
– cach · in · na · tion \ ˌ ka-k ə - ' n ā -sh ə n \ noun