Where does “no” come from?

no (Old Catalan) comes from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

Ancestry of “no”, step by step

StepLanguageWordMeaning
1Latinnōnnot
2Old Latinnoenum—
3Proto-Indo-Europeanóynosone; single

Words derived from “no”

Every word from Proto-Indo-European óynos →Every word from Old Latin noenum →Every word from Latin nōn →