obtuseness 

英汉解释

n. 迟钝；愚笨

同义词

n. dullness

反义词

n.   acuteness

参考例句

1. But I am pretty sure that he is not guilty of "deliberate obtuseness."
但是，我却极度相信，他可不是犯“故意反应迟钝”的错误。
2. cried the Rat, in despair at his obtuseness. 'Here, stop arguing and come and scrape! '
看到鼹鼠这么迟钝不开窍，河鼠无可奈何地喊道。
3. But in writing and painting they're mostly internal; the obstacle is your own obtuseness.
而写作和绘画中，困难往往是内在的-限制你的是自己迟钝的内心。

英英解释

n.
  1. the quality of being slow to understand
  2. the quality of lacking a sharp edge or point

网络释义

obtuseness
感觉迟钝; 钝角;
obtuseness acumen
愚笨敏锐;