Compounds of 済まない

• 済まない
  (adj-i) (1) (uk) inexcusable
  unjustifiable
  unpardonable
  (2) sorry
  remorseful
  apologetic
  conscience-stricken
  contrite
  (exp) (3) excuse me
  (I'm) sorry
  thank you
  (P)
• 気が済まない
  (exp) not to be able to settle down (if something is not done)
  must (do something)