Main Entry: cach·in·nate

Pronunciation: \ˈka-kə-ˌnāt\

Function: intransitive verb

Inflected Form(s): cach·in·nat·ed; cach·in·nat·ing

Etymology: Latin cachinnatus, past participle of cachinnare, of imitative origin

Date: 1824

: to laugh loudly or immoderately

— cach·in·na·tion \ˌka-kə-ˈnā-shən\ noun