adultery
/əˈdʌltərɪ/noun
mass noun
- voluntary sexual intercourse between a married person and a person who is not their spouse私通, 通奸：
she was committing adultery with a much younger man.
她和一个比她年轻得多的男人私通。
词源
late 15th cent.: from the obsolete noun adulter, from Latin adulter 'adulterer'， replacing an earlier form avoutrie, from Old French avouterie.