unfaithful

Not adhering to promises, obligations, or allegiances; disloyal. synonym: faithless.

Breaking trust in a marriage or relationship by having sexual relations with someone other than one’s spouse or sexual partner.

Not justly representing or reflecting the facts or a primary source; inaccurate.

Not faithful; not observant of promises, vows, allegiance, or duty.

Not performing the proper duty or function.

Not possessing faith; unbelieving; impious; infidel. Not trustworthy; inexact; not conforming to the letter and spirit: as, an unfaithful account; an unfaithful translation.

Synonyms Faithless, etc. (see perfidious); derelict.

Not faithful; not observant of promises, vows, allegiance, or duty; violating trust or confidence; treacherous; perfidious

Not possessing faith; infidel.