Where does “tortuos” come from?

tortuos (Old French) comes from French tortueux, from Latin tortuōsus, from Latin tortus, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “tortuos”, step by step

StepLanguageWordMeaning
1Frenchtortueuxtortuous, winding, windy, twisting, twisty;...
2Latintortuōsustwisting, tortuous
3Latintortustwisted, crooked; spun, whirled; bent, distorted
4Latin-tusForms the past participle of verbs; Forms...
5Proto-Italic-tus
6Proto-Indo-European-tusDerives action nouns from verb roots

Words derived from “tortuos

Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin tortus