Compounds of 鈍る

• 鈍る
  (v5r,vi) to become less capable
  to grow dull
  to become blunt
  to weaken
• 鈍る
  (v5r,vi) to become less capable
  to grow dull
  to become blunt
  to weaken
  (P)
• 腕が鈍る
  (exp) to become less capable
• 決心が鈍る
  (exp) to waver in one's resolution