1. of an angle; between 90 and 180 degrees

2. (of a leaf shape) rounded at the apex

3. lacking in insight or discernment;

   "too obtuse to grasp the implications of his behavior"
   "a purblind oligarchy that flatly refused to see that history was condemning it to the dustbin"
   

4. slow to learn or understand; lacking intellectual acuity;

   "so dense he never understands anything I say to him"
   "never met anyone quite so dim"
   "although dull at classical learning, at mathematics he was uncommonly quick"
   "dumb officials make some really dumb decisions"
   "he was either normally stupid or being deliberately obtuse"
   "worked with the slow students"
   

1.迟钝的；愚笨的
Someone who isobtuse has difficulty understanding things, or makes no effort to understand them.

e.g. I've really been veryobtuse and stupid...
我实在笨得不可理喻。
e.g. I'm a limited andobtuse clergyman while you're the expert.
你是专家，而我是个能力有限的愚笨牧师。

2.（角）钝的；钝角的
Anobtuse angle is between 90˚ and 180˚.

1. 鈍角：给你一个三角形的边长,请你判断它是锐角 (acute)、直角 (right)、或是钝角 (obtuse) 三角形.

2. obtuse的意思

2. 我不会吐丝,而别的蚕都吐--笨的、钝角的：4) Parsimonious:怕使用钱财--吝啬的 | 5)obtuse:我不会吐丝,而别的蚕都吐--笨的、钝角的 | 6) Squander:(口袋)是光的--浪费、挥霍

3. 钝的：obturator 填塞器 |obtuse 钝的 |obtusely 钝地

4.

4. 钝的,钝角的,抑制声音：obstruction-free flow area 有效流动截面 |obtuse 钝的,钝角的,抑制声音 |obtuse angle 钝角