adultery

adultery
noun
  1. [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。
语源
  1. late 15th cent.: from the obsolete noun adulter, from Latin adulter 'adulterer', replacing an earlier form avoutrie, from Old French avouterie
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