2 sentences for 人性 (rén​xìng — humanity)

1. 他做出这种事，简直是丧失人性。

   tā zuò​chū zhè zhǒng shì, jiǎn​zhí shì sàng​shī rén​xìng.

   For him to do such a thing is simply a loss of humanity.

   Source: Dong Chinese Dictionary

2. 这种残暴的行为简直是灭绝人性。

   zhè zhǒng cán​bào de xíng​wéi jiǎn​zhí shì miè​jué rén​xìng.

   This brutal behavior is simply inhuman.

   Source: Dong Chinese Dictionary