Where does “fit” come from?

fit (Scots) comes from Northern Middle English fut, from Old English fōt, from Proto-West Germanic fōt, from Proto-Germanic fōts, from Proto-Indo-European pṓds, from Proto-Indo-European póds, from Proto-Indo-European ped- — to walk, to step; to stumble, to fall.

fit (Scots): foot; lower end; to foot