abjure
assert the contrary
belie
contest
contradict
contravene
controvert
counter
cross
deny
disallow
disavow
disclaim
disown
disprove
dispute
forswear
gainsay
impugn
join issue upon
negate
negative
not accept
not admit
nullify
oppose
recant
refuse to admit
refute
renounce
repudiate
retract
revoke
take back
take issue with
traverse
disaffirming