boast

n. 吹牛
v. 吹牛,自夸

Don't believe him; he is just boasting.

别相信他，他只是在吹嘘罢了。

It is one of their proudest boasts that they have halved the death rate from typhoid.

他们使伤寒病人的死亡率降低了一半，这是他们最感骄傲的事之一。