OriginFrom French coupon.
Formskuponen(definite, singular) · kuponer(indefinite, plural) · kupon(indefinite, nominative, singular) · kuponen(definite, nominative, singular) · kuponer(indefinite, nominative, plural) · kuponerne(definite, nominative, plural) · kupons(genitive, indefinite, singular) · kuponens(definite, genitive, singular) · kuponers(genitive, indefinite, plural) · kuponernes(definite, genitive, plural)
Source: Wiktionary — CC BY-SA 4.0