Where does “couteau” come from?

couteau (Middle French) comes from Old French costel, from Latin costa, from Proto-Indo-European kost-.

Ancestry of “couteau”, step by step

StepLanguageWordMeaning
1Old Frenchcostel—
2Latincostaa rib; a side, a wall
3Proto-Indo-Europeankost-—

Words derived from “couteau”

Every word from Proto-Indo-European kost- →Every word from Latin costa →Every word from Old French costel →