To roast or cook meat on a spit over fire.
From Old French assater, from a- (to) + sate (spit). The word combines Latin ad- with Old French sate meaning a wooden spit used in medieval cooking.
Medieval kitchens had entire professions devoted to people who did nothing but turn spits—assaters were skilled workers, and the word shows how specific old occupations had their own vocabulary that's now completely forgotten.
Complete word intelligence in one call. Free tier — 50 lookups/day.