disallow (v.)

• abjure
• ban
• bar
• belie
• blackball
• contest
• contradict
• contravene
• controvert
• counter
• cross
• debar
• decline
• default
• deny
• disagree
• disapprove
• disavow
• disclaim
• disfavor
• dishonor
• disown
• disprove
• dispute
• dissent
• embargo
• enjoin
• exclude
• forbid
• forswear
• gainsay
• impugn
• inhibit
• interdict
• levant
• negate
• negative
• nullify
• object
• oppose
• ostracize
• outlaw
• preclude
• prevent
• prohibit
• proscribe
• protest
• recant
• refuse
• refute
• reject
• renounce
• repress
• repudiate
• retract
• revoke
• suppress
• taboo
• welsh
• withhold