† treachetourObs. [? f. trechet v. + -our; or perh. a scribal or printer's error for *treacherour, treacherer.] A deceiver, a traitor. 1590Spenser F.Q. ii. x. 51 The king was by a Treachetour Disguised slaine, ere any thereof thought.1596Ibid. vi. viii. 7 Ye caytiue treachetours vntrew.