swear

The coach told the players they would be benched if they continued to swear at the referee.

(Chinese) 教练告诉球员，如果他们继续对裁判说脏话，就会被罚下场。

She accidentally hit her thumb with the hammer and couldn't help but swear out loud.

(Chinese) 她不小心用锤子砸到了大拇指，禁不住大声骂了一句。

Witnesses in court must swear an oath to tell the truth before they give their testimony.

(Chinese) 法庭上的证人在提供证词前必须宣誓说真话。

I swear that I will return the borrowed money by next Friday without fail.

(Chinese) 我发誓我一定会在下周五前归还借款。