Answer:
1. Veto is refusal to approve or admit. Veto , as it´s often used in the media while reporting about politics, is a legal resource used by a branch of government to refuse endorsing, passing or approving a measure, a legal act (it could a legislative bill, a presidential decree) adopted by another branch of government.
2. The US president announced he would veto a Congress bill that intends to reform environmental regulations.
3. Synonims: ban, embargo, interdict, proscription.
Step-by-step explanation: