2 sentences

1. 他做事毫无顾忌，完全不考虑他人的感受。

   tā zuò​shì háo​wú gù​jì, wán​quán bù kǎo​lǜ tā​rén de gǎn​shòu.

   He acts without any scruples, completely disregarding the feelings of others.

   Source: Dong Chinese Dictionary

2. 他因为心里有所顾忌，说话总是吞吞吐吐的。

   tā yīn​wèi xīn​li yǒu​suǒ gù​jì, shuō​huà zǒng​shì tūn​tūn​tǔ​tǔ de.

   Because he had some misgivings, he always spoke hesitantly.

   Source: Dong Chinese Dictionary