veto [ˈvi:təʊ]

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n.否决权；v.否决；vi.否决，禁止；vt.使用否决权

(a) refusal to allow something to be done

The President has the power of veto. 总统有否决权。
Father put a veto upon our staying out late. 父亲不许我们在外面逗留太晚。