Probably from a medieval misreading of Old French grané 'spiced sauce' — a scribal error may have created the word.
A sauce made from the juices of cooked meat, thickened and seasoned.
From Middle English gravé, probably a misreading of Old French grané 'sauce, stew,' from grain 'grain, spice,' from Latin grānum 'grain, seed.' A medieval scribal error may have turned the 'n' into a 'v' — if so, the entire word 'gravy' exists because of a copying mistake. Key roots: *ǵr̥h₂-nóm (Proto-Indo-European: "grain").