Ideographic: To question 考 by hand 扌; 考 also provides the pronunciationRadical:

meaning for kǎo:

  • - to beat
  • - to flog
  • - to examine under torturecopy
  • - to copy (loanword)to question via tortureto beat a prisoner (to obtain confessions)
  • - to give sb the third degree
  • - to torturevariant of 绷扒吊拷 to strip, tie up, hang and beat sb, an ancient torture technique