Where does “yessir” come from?

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

yessir (English): Term of address to a male; mate; buddy

Definitions

  1. Term of address to a male; mate; buddy

Ancestry of “yessir”, step by step

yessir traces back through two separate lines of ancestry.

via English Sir

StepLanguageWordMeaning
1EnglishSirAlternative letter-case form of sir; The titular...
2EnglishsireA lord, master, or other person in authority,...
3Middle EnglishsireUsed preceding the name or title of a knight,...
4Old Frenchsirenominative singular of sieur; master, sir, lord;...
5Vulgar Latinseior
6Latinseniorolder, elder; rather old; a lord, sir; an abbot
7Latinsenexold, aged, elderly; old person, old man, old...
8Proto-Indo-Europeansénosold

via English yes

StepLanguageWordMeaning
1EnglishyesUsed to show agreement or acceptance; Used to...
2Middle EnglishyesAlternative form of is; plural of ye; Alternative...
3Old Englishġīese"yes"; literally, "so be it"

Words derived from “yessir

Every word from Proto-Indo-European sénosEvery word from Latin senexEvery word from Latin senior