verb
annul, repeal, invalidate, quash; see cancel 2, revoke.
See nullify in Webster's New World Roget's A-Z Thesaurus II
To put an end to, especially formally and with authority:
To make ineffective by applying an opposite force or amount:
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Also Mentioned In
» annihilate
» annul
» arbitration
» balance
» cancel
» cashier
» defeat
» frustrate
» kill
» negate
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