commutation
noun [ U ] law specialized uk/ˌkɒm.jəˈteɪ.ʃən/ us/ˌkɑː.mjəˈteɪ.ʃən/
减刑
the act of changing a punishment to one that is less severe
His execution became certain when the state board refused his request for commutation. 州委员会拒绝了他的减刑请求，他被执行死刑已确定无疑。