讳言的英文：
dare not or would not speak up

参考例句：

To forbid to mention the affair
讳言其事

I said he was an idiot.
我不讳言，我说过他是白痴。

I said he was an idiot
我不讳言,我说过他是白痴

dare是什么意思：
v. 敢；敢做；敢冒...的险；无畏于；激（某人做某事）
n. 挑战；挑动

"Dare you ask him ? No , I dare not ."
敢问他吗?不敢。

How dare you to flout at him?
你怎敢嘲弄他？

Don' t you dare sauce me!
你竟敢对我无礼！

would是什么意思：
v. 会；就会；以便；总是；就

This would be such a chink.
而这一结果很可能就是一个这样的裂缝。

There would come a day when the wheelchair would be gone and I would walk.
总有一天，会甩掉轮椅，自己走路。

You would expect that there would be / there to be strong disagreement about this.
你大概认为关于这事将有一场激烈的争论。

speak是什么意思：
v. 谈话；说话；提起；会讲；…行话；演讲；代表；表明；显示；不言而喻

Don't speak for your friend, speak for yourself.
不要代表你的朋友发言了，谈谈你自己的看法吧。

Don't speak for your friend,speak for yourself.
不要代表你的朋友发言了，谈谈你自己的看法吧。

It is one thing to speak much and another to speak pertinently
话讲得多是一回事,讲得恰当是另一回事