■ verb
1》 act treacherously towards (one's country) by aiding the enemy.
↘be disloyal to or inform on.
2》 unintentionally reveal; be evidence of: she drew a deep breath that ~ed her indignation.
Derivatives
~al noun
~er noun
Origin
ME: from be- + obs. tray '~', from OFr. trair , based on L. tradere 'hand over'.