cuckold

Origin

From Middle English cokolde, cokewold, cockewold, kukwald, kukeweld, from Old French cucuault; a compound of cucu (“cuckoo”) and Old French -auld. The word references the behavior of cuckoo birds where they lay their eggs in another bird’s nest. Cucu is either a directly derived onomatopoeic derivative of the cuckoo's call, or from Latin cucūlus. Latin cucūlus is a compound of onomatopoeic cucu (compare Late Latin cucus) and the diminutive suffix -ulus.