From Longman Dictionary of Contemporary Englishbunionbun‧ion /ˈbʌnjən/ noun [countable] MIa painful lump on the first joint of your big toe
Examples from the Corpus
bunion• He had the charm of a bunion.• Their feet are an awful dream of bunions - but the buffalo's brazil nut bugle-horns can never sound reveille.Origin bunion (1700-1800) bunny “swelling” ((15-18 centuries)), probably from Old French bugne; → BUN 