Where does “móo” come from?

móo (Old Irish) comes from Proto-Celtic māyos, from Proto-Indo-European meh₁- — to measure.

Ancestry of “móo”, step by step

StepLanguageWordMeaning
1Proto-Celticmāyos—
2Proto-Indo-Europeanmeh₁-to measure
Every word from Proto-Indo-European meh₁- →Every word from Proto-Celtic māyos →
móo — Etymology, Origin & Word History | Etymology Explorer