2 sentences for 刀 (dāo — cut)

1. 他的手臂上挨了一刀。

   tā de shǒu​bì shàng ái le yī dāo.

   He was slashed in the arm with a knife.

   Source: Dong Chinese Dictionary

2. 这一刀正中心脏，是导致他死亡的致命伤。

   zhè yī dāo zhèng​zhōng xīn​zàng, shì dǎo​zhì tā sǐ​wáng de zhì​mìng​shāng.

   The stab went straight to the heart and was the fatal wound that caused his death.

   Source: Dong Chinese Dictionary