钝 (dùn) — (of a blade or point) blunt, dull; (of a person's mind) dull-witted, slow

Definition

Examples

• 这把刀太钝了，切不动菜。
  Zhè bǎ dāo tài dùn le, qiè bú dòng cài.
  This knife is too blunt to cut vegetables.
• 他头脑有点迟钝，学新东西很慢。
  Tā tóu nǎo yǒu diǎn chí dùn, xué xīn dōng xī hěn màn.
  His mind is a bit slow; he learns new things very slowly.
• 铅笔写久了会变钝，该削了。
  Qiān bǐ xiě jiǔ le huì biàn dùn, gāi xiāo le.
  A pencil gets dull after writing for a while; it needs sharpening.

Origin