Where does “vlach” come from?

vlach (Middle High German) comes from Old High German flah, from Proto-West Germanic *flak, from Proto-Germanic flakaz, from Proto-Indo-European pl̥keh — flat surface.

Ancestry of “vlach”, step by step

StepLanguageWordMeaning
1Old High Germanflahflat, smooth
2Proto-West Germanic*flak—
3Proto-Germanicflakazflat
4Proto-Indo-Europeanpl̥kehflat surface

Words derived from “vlach”

Every word from Proto-Indo-European pl̥keh →Every word from Proto-Germanic flakaz →Every word from Proto-West Germanic *flak →