cuckold: [13] Cuckold is a derivative of cuckoo, the cuckoo’s invasion of other birds’ nests perhaps being viewed as analogous to the stealing of a wife’s affections by another man. It is not an original English coinage, but was borrowed from an unrecorded Anglo-Norman *cucuald, a variant of Old French cucuault, which in turn was formed from cucu ‘cuckoo’ and the pejorative suffix -ault. => cuckoo[cuckold etymology, cuckold origin, 英语词源]