adj. 25B6; adjective UNFAITHFUL, faithless, disloyal, untrue, inconstant, false, false-hearted, deceiving, deceitful, treacherous; extramarital; informal cheating, two-timing.
faithful.
ADULTEROUS
Meaning of ADULTEROUS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012