The correct reading けいばつけん uses standard On'yomi. The small つ (っ) arises from the euphonic change between 罰 (バツ) and 権 (ケン), though it's often written as けいばつ けん. This term denotes the state's inherent authority to impose punishments on individuals who violate its laws, a fundamental aspect of the justice system.

正しい読みは「けいばつけん」で、全て音読みです。「罰」と「権」の間に促音が生じます。国家が法律を犯した者に対して刑罰を科すことのできる権限、つまり国家の持つ懲罰権能を指します。