Ideographic: One who fought 斗 a ghost 鬼; 鬼 also provides the pronunciationRadical:

meaning for kuí:

  • - chief
  • - head
  • - outstanding
  • - exceptional
  • - stalwarttall and sturdycriminal ringleader, main offender (idiom)
  • - main culprit
  • - fig. main cause of a disasterto seize
  • - to wincriminal ringleader
  • - chief culprit
  • - fig. cause of a problemfaction leader
  • - head of political party