Where does “oratoire” come from?

oratoire (Middle French) comes from Latin ōrātōrium, from Latin ōrātōrius, from Latin -tōrius, from Latin -tor, from Proto-Italic -tōr, from Proto-Indo-European -tōr, from Proto-Indo-European -tor-s.

Ancestry of “oratoire”, step by step

StepLanguageWordMeaning
1Latinōrātōrium—
2Latinōrātōriusoratorical
3Latin-tōriusory
4Latin-tor-er
5Proto-Italic-tōrForms agent nouns to verb stems
6Proto-Indo-European-tōrDerives agent nouns from verbs, denoting someone...
7Proto-Indo-European-tor-s—

Words derived from “oratoire”

Every word from Proto-Indo-European -tor-s →Every word from Latin -tor →Every word from Latin -tōrius →