Where does “um” come from?

um (Portuguese) comes from Old Portuguese ũu, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

um (Portuguese): one; a, an; The figure or digit "1": one

Definitions

  1. one; a, an; The figure or digit "1": one

Ancestry of “um”, step by step

StepLanguageWordMeaning
1Old PortugueseũuMasculine singular indefinite article; a; an
2Latinūnusone, single
3Old Latinoinosone
4Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
5Proto-Indo-Europeanóynosone; single

Words derived from “um”

Every word from Proto-Indo-European óynos →Every word from Proto-Italic oinos →Every word from Old Latin oinos →