Where does “cățelușă” come from?

cățelușă (Romanian) comes from Romanian ușă, from Vulgar Latin ustia, from Latin Ostia, from Latin ōs, from Proto-Italic ōs, from Proto-Indo-European h₃ésth₁ — bone.

Ancestry of “cățelușă”, step by step

cățelușă traces back through two separate lines of ancestry.

via Romanian ușă

StepLanguageWordMeaning
1Romanianușădoor
2Vulgar Latinustia—
3LatinOstiaOstia
4Latinōsmouth
5Proto-Italicōsmouth
6Proto-Indo-Europeanh₃ésth₁bone

via Romanian cățea

StepLanguageWordMeaning
1Romaniancățeafemale dog; bitch; bitch
2Latincatellaa little bitch, bitch puppy, female whelp; a...
3Latincatēnachain
4Proto-Indo-Europeankat-cub; to weave, to braid; to link or weave...
Every word from Proto-Indo-European h₃ésth₁ →Every word from Proto-Italic ōs →Every word from Latin ōs →