Ideographic: A thousand 千 corpses 歹; 千 also provides the pronunciationRadical:

meaning for jiān:

  • - to annihilate
  • - abbr. for 歼击机 , fighter planeto wipe out
  • - to crush
  • - to annihilateto annihilate
  • - to wipe out completely
  • - to exterminatefighter planeto annihilate
  • - to round up and wipe outto annihilate
  • - to attack and destroy
  • - Jianji, PRC fighter plane based on Soviet MiG
  • - usually 歼击 8型