2 sentences for 口舌 (kǒu​shé — persuasion)

1. 费了半天口舌，结果事儿还是落空了。

   fèi le bàn​tiān kǒu​shé, jié​guǒ shì r hái​shi lào​kōng le.

   Despite all the talking, the matter still fell through.

   Source: Dong Chinese Dictionary

2. 费了半天口舌，他终于答应了我们的请求。

   fèi le bàn​tiān kǒu​shé, tā zhōng​yú dā​ying le wǒ​men de qǐng​qiú.

   After a lot of talking, he finally agreed to our request.

   Source: Dong Chinese Dictionary