dull, slow, foolish, blunt

Radicals

Common words

• 鈍い【にぶい】
  dull (e.g. a knife), blunt, thickheaded, obtuse, stupid, dull (sound, color, etc.), dim (light), slow, sluggish, inert, lethargic, insensitive, dull (e.g. reflexes), unperceptive, unfeeling
• 鈍感【どんかん】
  thickheaded, insensitive, dull, thick-skinned
• 鈍る【にぶる】
  to become blunt, to grow dull, to become less capable, to weaken, to falter
• 鈍器【どんき】
  blunt weapon