Jisho

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I-adjective (keiyoushi)
1. dull (e.g. a knife); blunt
I-adjective (keiyoushi)
2. thickheaded; obtuse; stupid
I-adjective (keiyoushi)
3. dull (sound, color, etc.); dim (light)
I-adjective (keiyoushi)
4. slow; sluggish; inert; lethargic
I-adjective (keiyoushi)
5. insensitive; dull (e.g. reflexes); unperceptive; unfeeling

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