Where does “ouïr” come from?

ouïr (Middle French) comes from Old French oir, from Latin audire, from Latin audio, from Proto-Indo-European h₂ew-is-d-, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “ouïr”, step by step

StepLanguageWordMeaning
1Old Frenchoirto listen; to hear
2Latinaudirepresent active infinitive of audiō; second-person...
3LatinaudioI hear, listen to; I attend, pay attention to; I...
4Proto-Indo-Europeanh₂ew-is-d-
5Proto-Indo-Europeandʰeh₁-to do, put, place
Every word from Proto-Indo-European dʰeh₁-Every word from Proto-Indo-European h₂ew-is-d-Every word from Latin audio