Where does “sir” come from?

sir (Middle English) comes from Middle English sire, from Old French sire, from Vulgar Latin seior, from Latin senior, from Latin senex, from Proto-Indo-European sénos — old.

sir (Middle English): Alternative form of sire

Definitions

  1. Alternative form of sire

Ancestry of “sir”, step by step

StepLanguageWordMeaning
1Middle EnglishsireUsed preceding the name or title of a knight,...
2Old Frenchsirenominative singular of sieur; master, sir, lord;...
3Vulgar Latinseior—
4Latinseniorolder, elder; rather old; a lord, sir; an abbot
5Latinsenexold, aged, elderly; old person, old man, old...
6Proto-Indo-Europeansénosold

Words derived from “sir”

Every word from Proto-Indo-European sénos →Every word from Latin senex →Every word from Latin senior →