nullify (v.)

• abate
• abjure
• abolish
• abrogate
• absolve
• annihilate
• annul
• belie
• buffer
• cancel
• compensate
• confine
• contest
• contradict
• contravene
• controvert
• counter
• counteract
• counterbalance
• countermand
• countervail
• cross
• deny
• disallow
• disavow
• disclaim
• disown
• disprove
• dispute
• forswear
• frustrate
• gainsay
• impugn
• invalidate
• limit
• negate
• negative
• neutralize
• obliterate
• offset
• oppose
• override
• overrule
• quash
• recall
• recant
• refute
• renege
• renounce
• repeal
• repudiate
• rescind
• restrict
• retract
• reverse
• revoke
• stultify
• suspend
• thwart
• undo
• vacate
• vitiate
• void
• waive
• withdraw