When you give a big, loud laugh at a joke, this is an example of a time when you cachinnate.
intransitive verb-·nat·ed, -·nat·ing
Origin of cachinnatefrom Classical Latin cachinnatus, past participle of cachinnare: ultimately of echoic origin, originally
intransitive verbcach·in·nat·ed, cach·in·nat·ing, cach·in·nates
Origin of cachinnateLatin cachinnāre cachinnāt- of imitative origin
(third-person singular simple present cachinnates, present participle cachinnating, simple past and past participle cachinnated)
- (intransitive) To laugh loudly, immoderately, or too often.
- The villain began to cachinnate and twirl his moustache.