Pronunciation: [ kak-uh-neyt ]
Origin: Early 19th century; Latin
Etymology: from Latin cachinnat- ‘laughed loudly’, from the verb cachinnare, of imitative origin
1. (verb) to laugh loudly or immoderately
Synonym(s): cackle, guffaw, roar
Antonym(s): cry, utterance
Example: When the woman suddenly began to cachinnate in the middle of the wedding ceremony, everyone gave her looks of disapproval.