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KJV Dictionary Definition: treacherous

treacherous

TREACHEROUS, a. trech'erous. See Treachery. Violating allegiance of faith pledged; faithless; traitorous to the state or sovereign; perfidious in private life; betraying a trust. A man may be treacherous to his country, or treacherous to his friend, by violating his engagements or his faith pledged.

treacherously

TREACHEROUSLY, adv. trech'erously. By violating allegiance or faith pledged; by betraying a trust; faithlessly; perfidiously; as, to surrender a fort to an enemy treacherously; to disclose a secret treacherously.

You treacherously practic'd to undo me.

treacherousness

TREACHEROUSNESS, n. trech'erousness. Breach of allegiance or of faith; faithlessness; perfidiousness.