Where does “um” come from?

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

um (Indo-Portuguese): a

Definitions

  1. a

Ancestry of “um”, step by step

StepLanguageWordMeaning
1Portugueseumone; a, an; The figure or digit "1": one
2Old PortugueseũuMasculine singular indefinite article; a; an
3Latinūnusone, single
4Old Latinoinosone
5Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
6Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European óynos →Every word from Proto-Italic oinos →Every word from Old Latin oinos →