Where does “cău” come from?

cău (Romanian) comes from Latin cavus, from Proto-Italic kawos, from Proto-Indo-European ḱowh₁ós, from Proto-Indo-European ḱewh₁- — to swell; to be strong.

Ancestry of “cău”, step by step

StepLanguageWordMeaning
1Latincavushollow, concave; excavated, channeled;...
2Proto-Italickawos—
3Proto-Indo-Europeanḱowh₁óshollow
4Proto-Indo-Europeanḱewh₁-to swell; to be strong
Every word from Proto-Indo-European ḱewh₁- →Every word from Proto-Indo-European ḱowh₁ós →Every word from Proto-Italic kawos →