unperceptive

Even though she had known him for years, she remained unperceptive about his growing anxiety.

尽管认识他多年，她对他日益增长的焦虑仍然不敏锐。

His unperceptive response showed that he had not understood the question.

他迟钝的回答表明他没有理解这个问题。

I felt unperceptive when everyone laughed at the joke and I had no idea why.

当大家都笑这个笑话而我不知道为什么时，我觉得自己很迟钝。