Where does “cachinnatus” come from?

cachinnatus (Latin) comes from Latin cachinno, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

cachinnatus (Latin): cachinnated

Definitions

  1. cachinnated

Ancestry of “cachinnatus”, step by step

StepLanguageWordMeaning
1LatincachinnoI laugh loudly or immoderately; I cachinnate; I...
2Latin-ōsuffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
3Proto-Indo-European-ōDerives nouns from roots
Every word from Proto-Indo-European -ō →Every word from Latin -ō →Every word from Latin cachinno →