- In awfully tidy file, there’s evidence of cheating - not being faithful to a spouse or lover - Unfaithfulness - Want of faith or belief in some religious system;
especially, a want of faith in, or disbelief of, the inspiration of the
Scriptures, of the divine origin of Christianity. - Unfaithfulness to the marriage vow or contract;
violation of the marriage covenant by adultery. - Breach of trust; unfaithfulness to a charge, or to
moral obligation; treachery; deceit; as, the infidelity of a servant.