Where does “cuțitoi” come from?

cuțitoi (Romanian) comes from Romanian cuțit, from Latin cotitus, from Latin cotire, from Latin cos, from Proto-Italic kōtis, from Proto-Indo-European ḱeh₃- — to sharpen, whet; sharpen.

Ancestry of “cuțitoi”, step by step

StepLanguageWordMeaning
1Romaniancuțitknife
2Latincotitussharpened
3Latincotiresharpen
4Latincoswhetstone
5Proto-Italickōtis—
6Proto-Indo-Europeanḱeh₃-to sharpen, whet; sharpen
Every word from Proto-Indo-European ḱeh₃- →Every word from Proto-Italic kōtis →Every word from Latin cos →