Where does “sei” come from?

sei (Old French) comes from Latin sēdēs, from Latin sedeō, from Proto-Italic sedēō, from Proto-Indo-European sḗd- — to sit.

Ancestry of “sei”, step by step

sei traces back through two separate lines of ancestry.

via Latin sēdēs

StepLanguageWordMeaning
1Latinsēdēsseat, chair
2Latinsedeōto sit, to be seated
3Proto-Italicsedēōsit, be sitting, be seated
4Proto-Indo-Europeansḗd-to sit

via Latin sē

StepLanguageWordMeaning
1Latinsēwithout
2Proto-Indo-Europeanswéself

Words derived from “sei”

Every word from Proto-Indo-European sḗd- →Every word from Proto-Italic sedēō →Every word from Latin sedeō →