betrayer

Apple used to count Google as an ally, but now views Google as a sneaky betrayer.

If I see anything that toucheth me, shall I come forth a betrayer of myself presently?

Her pride did not even allow her to admit that the girl had gone away after her betrayer.

He was back in the office forthwith, and in the next morning's issue denounced his betrayer.

It had been horrible to fancy for a moment that this man whom she despised in her heart could be her mother's betrayer.

No inconsistency about a woman betrayed executing vengeance on her betrayer!