ˈkakəˌnāt intransitive verb
( -ed/-ing/-s )
Etymology: Latin cachinnatus, past participle of cachinnare; probably of imitative origin like Old English ceahhetan to laugh loudly Old High German kachazzen, Greek kachazein to laugh loudly, Sanskrit kakhati he laughs
: to laugh usually loudly or convulsively
cachinnated till his sides must have ached — John Burroughs
• cach·in·na·tion ˌkakəˈnāshən noun -s