The antonyms for the phrase "wert loyal to" are disloyal, unfaithful, treacherous, faithless, untrue, backstabbing, perfidious, and disingenuous. These words represent the opposite of loyalty and suggest a sense of betrayal or lack of trustworthiness. Being disloyal means being untrustworthy, while unfaithful implies breaking faith or betrayal. Treacherous denotes a deliberate intention to deceive or harm someone, whereas faithless encompasses a lack of loyalty or trust in relationships. Untrue suggests not being true to oneself, while backstabbing and perfidious indicate betraying someone's trust. Finally, disingenuous denotes being insincere or deceitful.