Where does “sier” come from?

sier (Middle French) comes from Old French seër, from Latin secare, from Latin seco, from Proto-Indo-European sek- — to cut, cut off, sever.

Ancestry of “sier”, step by step

sier traces back through 3 separate lines of ancestry.

via Old French seër

StepLanguageWordMeaning
1Old Frenchseër
2Latinsecareinflection of secō: ## present active...
3LatinsecoI cut, cut off; I cleave, divide; I operate,...
4Proto-Indo-Europeansek-to cut, cut off, sever

via Old French seier

StepLanguageWordMeaning
1Old Frenchseier
2Latinsecāre

via Old French sier

StepLanguageWordMeaning
1Old Frenchsierto cut
Every word from Proto-Indo-European sek-Every word from Latin secoEvery word from Latin secare