Meaning

noun hybrid offspring of a male donkey and a female horse; usually sterile

noun a slipper that has no fitting around the heel

originEtymology tree substratebor.? Proto-Italic *musklos? Latin mūlus Proto-Indo-European *-h₂ Proto-Indo-European *-eh₂ Proto-Italic *-ā Latin -a Latin mūla Anglo-Norman mulebor. ▲ Latin mūlusbor. Proto-West Germanic *mūl Old English mūl Middle English mule English mule Inherited from Middle English mule, from Anglo-Norman mule (“she-mule”) and Old English mūl, both ultimately from Latin mūlus, from…

Etymology from Wiktionary, CC BY-SA 3.0