誓言的英文：
oath
promise
pledge

参考例句：

a volley of oaths.
誓言的迸发

It's time to redeem that vow!
到履行誓言的时候了！

Promises are scary things.
誓言令人生畏。

A solemn promise,undertaking,pledge,etc
郑重的许诺、保证、誓言等.

Violate an agreement,oath,etc
违背协议、誓言等

A teetotal pledge
完全戒酒誓言

the sanctity of an oath
誓言的神圣性

One honest word is better than two oaths
两句誓言不如一句实话

He vowed to take legal action.
他誓言要采取法律行动。

They had broken their parole and fled.
他们违背假释誓言，逃之夭夭。

oath是什么意思：
n. 誓言，誓约；宣誓；诅咒，咒骂

It contained oaths and slang phrases.
起中有咒骂，也有黑话。

Zeus mocks lovers'oaths.
天神嘲笑情人之间虚伪的誓言。

He ground out an oath.
他咬牙切齿地诅咒。

promise是什么意思：
n. 许诺；希望，指望
v. 许诺；给人以…的指望或希望

His promise was faithfully kept.
他忠实地履行自己的诺言。

The preacher promised us eternity.
这传道士向我们许诺会有来世。

She recalled her promise.
她取消了约言。

pledge是什么意思：
n. 抵押；典当品；许诺；誓言；信物
v. 保证，发誓；用…抵押

The property was pledged as security for loans.
这地产被当作贷款的抵押。

He pledged to fulfil his trust.
他保证履行责任。

You must not pledge your own health
切不可把健康作孤注一掷