veto
ve-to
verb
To use one's authority to reject or forbid a decision or proposal.
"The council voted to veto the new plan."
noun
An official right or power to unilaterally reject a decision or proposal.
"The President exercised his veto power."
Thesaurus
Synonyms: proscribe, forbid, disallow, interdict, nix, prohibit, blackball, negative
Antonyms: allow, countenance, let, permit