2 sentences for 难听 (nán​tīng — offensive)

1. 你怎么能说这么难听的话？

   nǐ zěn​me néng shuō zhè​me nán​tīng de huà?

   How could you say such unpleasant things?

   Source: Dong Chinese Dictionary

2. 他在大家面前故意说些难听的话来糟蹋我。

   tā zài dà​jiā miàn​qián gù​yì shuō xiē nán​tīng de huà lái zāo​tà wǒ.

   He intentionally said nasty things in front of everyone to humiliate me.

   Source: Dong Chinese Dictionary