诺言的英文：
word

nail down; nail in;hold by
钉住;使人遵守诺言

an infrangible promise
不能违反的诺言

Renege on one's promise
违背诺言,破坏约定,食言

Such promises of cleaning up on the part of the bourgeois politicians are all preelection rhetoric
资产阶级政客们这类实行改革的诺言，完全是为谋

Political promises are often pie in the sky.
政治诺言常常是不保证能够实现的。

Be false to one's word
不守诺言

Recede from a promise
背弃诺言

The fulfillment of a promise
诺言的实现

To stand By one's promise
遵守诺言

Signed a pledge never to reveal the secret;a pledge of money to a charity.
签署决不泄露秘密的诺言;捐钱给慈善事业的诺言

There is an
在apple这个词中有一个字母A。

This is a derivative word.
这是一个衍生词。

This is an informal word.
这是一种口语用语。

Bitter words and good acupuncture—to advise with faithful words.
苦语针砭。

The German word `Haus' is cognate with the English word `house'.
德语的haus一词和英语的house一词同源.