Punishment, Penalty
noun, の adjective
A punish penalty is a punishment.
けいばつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
犯罪を根絶するには、火あぶりの刑みたいな残酷な刑罰を全部復活させるべきだと思うね。
In order to root out crime, I think we should restore all the brutal punishments, like burning people at the stake.