1. In a disloyal and faithless manner
   "he behaved treacherously"
   - faithlessly, traitorously, treasonably, false

See also: treacherous

• bribe
• briber
• bribery
• bric-a-brac
• brick
• brick cheese
• brick in
• brick over
• brick red
• brick trowel
• brick up
• brick-shaped
• brickbat
• Brickellia
• brickfield
• brickfielder
• brickie
• brickkiln
• bricklayer
• bricklayer's hammer
• bricklaying
• brickle
• brickly
• bricks and mortar
• brickwork