cachinnate means to laugh immoderately, loudly, or too often. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why this word is great
CACHINNATE — [Verb] To laugh loudly, immoderately, or convulsively. From Latin cachinnō ("to laugh aloud"), of onomatopoeic origin, its harsh phonetics replicating the very spasm of the lungs and throat. Unlike "chuckle," which implies a private, restrained rumble, or "guffaw," which suggests a single, explosive burst, to cachinnate is to surrender to a prolonged and ungovernable seizure of mirth. It is the helpless, tear-streaked convulsion that overtakes one in a silent library; the ragged, echoing howl from a lone man on a deserted street; or the cruel, cascading peals that follow a public humiliation. This is the body's raw, vocal rebellion against the tyranny of decorum, a spirit momentarily overwhelmed by the absurdity of its own existence.
verb
- To laugh immoderately, loudly, or too often.“The villain began to cachinnate and twirl his moustache.”