unfaithful

adj 1: not true to duty or obligation or promises; "an unfaithful

lover" [ant: {faithful}]

2: deliberately and abominably disloyal or likely to betray

trust or confidence; "the faithless Benedict Arnold"; "a

lying traitorous insurrectionist" [syn: {faithless}, {traitorous}]

3: not trustworthy; "an unfaithful reproduction"