Where does “noncompos” come from?

noncompos (English) comes from English non compos mentis, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

noncompos (English): A foolish person

Definitions

  1. A foolish person

Ancestry of “noncompos”, step by step

StepLanguageWordMeaning
1Englishnon compos mentisInsane; not of sound mind; not in control of...
2Latinnōnnot
3Old Latinnoenum
4Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European óynosEvery word from Old Latin noenumEvery word from Latin nōn