负    心    [break friendship or love with sb.especially refer to transfer ones love to somebody else;fail one's beloved] 违背良心;背弃情义

贬义词。一般指爱情不专一，违背良心，背弃承诺和情义，移情别恋的行为。

负才使气    负隅顽抗    负德背义    负屈含冤    负芒披苇