bluntness

例句：

1. 1. The car's tyres were blunted from driving over potholes.
   汽车的轮胎因为驶过坑洼而变得钝了。
2. 2.He was clumsy with the knife and cut his finger.
   他用刀时手很笨，切到了手指。
3. 3.She was so thick-skinned that she didn't care about what others thought of her.
   她太固执了，对别人的看法毫不在意。