Compounds of 平気

• 平気
  (adj-na,n) coolness
  calmness
  composure
  unconcern
  (P)
• 虚心平気
  (n,adj-na,adj-no) with an open and calm mind
  without reserve
  with utmost candor
  with no preconceived notions
• 平気の平左
  (exp) quite unconcerned
  nonchalant