出典:Wiktionary
From the Old French scholarly form adultere (“violation of conjugal faith”) (in Bernard of Clairvaux, Sermons, 12c.), from Latin adulterium, from adulter. Replaced the older form avoutrie, from the popular Old French forms avouterie or aoulterie. Compare French adultère (“adultery”). Displaced 古期英語 ǣwbryċe. Not related to adult.
adultery (countable かつ uncountable, 複数形 adulteries)