adjective
not loyal or faithful; betraying someone's trust or confidence
-
The disloyal employee was eventually terminated for his lack of commitment to the company.
-
I can't believe she was so disloyal to her best friend by spreading rumors about her.
-
He's always been known as a backstabber, constantly being disloyal to his friends.
-
The disloyal act of the sun hiding behind the clouds made the picnic attendees disappointed.