"annulling" in the verb sense
1. invalidate, annul, quash, void, avoid, nullify
declare invalid
"The contract was annulled"
"void a plea"
2. revoke, annul, lift, countermand, reverse, repeal, overturn, rescind, vacate
cancel officially
"He revoked the ban on smoking"
"lift an embargo"
"vacate a death sentence"
Source: WordNet® (An amazing lexical database of English)
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