bar sb from sth/doing sth 禁止，阻止（某人做某事）
Three students were barred from using the library because they had damaged books.
三个学生被禁止去图书馆借书了，因为他们损坏过书籍。
The players are barred from drinking alcohol the night before a match.
运动员在比赛前夜喝酒是不被允许的。

prohibit sth (尤指以法令）禁止
prohibit sb (from) doing sth (尤指以法令）禁止
The policy prohibits smoking on school grounds.
政策禁止在校内吸烟。
Have you got any prohibited goods with you?
您随身带有违禁品吗？
Parking is strictly prohibited between these gates.
这些大门之间严禁停车。

veto sth 行使否决权，禁止
The mayor has vetoed the plan to build new offices.
市长否决了建新办公楼的计划。
I wanted to take some time off but my boss quickly vetoed that idea.
我想休假，但是这个想法马上就被老板否决了。

no go 不可能，不行，不允许
Drinking for me tonight is a no go, because I have to work early in the morning.
我今晚不能喝酒，明天要早起工作。
I'm afraid the trip to Shanghai is a no go; I can't get the time off work.
恐怕不能去上海了，我不能休假。

no-go area 禁区
She made it clear that her private life was a no-go area.
她明确表示了，不能谈论她的私生活。