1. He was so obtuse that he couldn't understand even the simplest instructions.
彼は鈍感すぎて、簡単な指示さえ理解できなかった。

2. She gave him an obtuse look, not comprehending what he was trying to say.
彼女は鈍感な表情を浮かべ、彼が言おうとしていることが理解できなかった。

3. The teacher was frustrated with the obtuse responses from her students.
先生は生徒たちの鈍感な返答にイライラしていた。

4. His obtuse behavior caused many misunderstandings among his friends.
彼の鈍感な行動が友達たちの間で多くの誤解を引き起こした。

5. The politician's obtuse remarks offended many people in the audience.
政治家の鈍感な発言が、観客の多くの人々を怒らせた。

6. Despite his obtuse nature, he was still able to excel in his chosen field.
彼の鈍感な性格にもかかわらず、彼は選んだ分野で優れた成績を収めることができた。