Compounds of 怠

• 間怠っこい
  (adj-i) (1) slow
  tedious
  sluggish
  dull
  (2) irritating
• 注意を怠る
  (exp) to be off one's guard
• 勉強を怠ける
  (exp) to neglect one's studies
• 人の怠慢を責める
  (exp) to blame (denounce) a person for his (her) negligence