Compounds of さむ

• 口ずさむ
  (v5m) to hum something
  to sing to oneself
• 口をはさむ
  (exp) to cut into (a conversation)
  to interject
• 小耳にはさむ
  (exp) to happen to hear
  to overhear
• 横から口をはさむ
  (exp,v5m) to butt into a conversation (from someone uninvolved)