1 sentence for 不快 (bù​kuài — blunt)

1. 这把菜刀太不快了，连肉都切不动。

   zhè bǎ cài​dāo tài bù​kuài le, lián ròu dōu qiē bù dòng.

   This kitchen knife is so dull that it won't even cut through meat.

   Source: Dong Chinese Dictionary