(archaic) A traitor or deceiver.

Treachery; the characteristic of being treacherous.

In a treacherous manner.

Exhibiting treachery. / Deceitful; inclined to betray. / Unreliable; dangerous.

plural of treacher

A surname.

A rare autosomal-dominant congenital disorder characterized by craniofacial deformities.

plural of treachery

Deliberate, often calculated, disregard for trust or faith. / The act of violating the confidence of another, usually for personal gain. / Treason. / (countable) An act or instance of treachery.

Characterised or marked by treachery; treacherous