1. I-adjective (keiyoushi)

   1.

   dull (e.g. a knife); blunt

2. 2.

   thickheaded; obtuse; stupid

3. 3.

   dull (sound, color, etc.); dim (light)

Example sentences

• 疲れてる時は頭の回転が鈍いんだよ。

  The gears in my head turn slowly when I'm tired.

• 全体的に鈍いくせに、意外なところに鋭いよね。

  Although dull in almost every aspect, you're sharp in the most unexpected matters.