ex·pi·ate 
/ˈɛkspiˌeɪt/ verb
ex·pi·ates; ex·pi·at·ed; ex·pi·at·ing /ˈɛkspiˌeɪt/ verb [+ obj] formal : to do something as a way to show that you are sorry about doing something bad
▪ trying to find a way to expiate [=atone for] his guilt/sin
▪ trying to find a way to expiate [=atone for] his guilt/sin
— ex·pi·a·tion /ˌɛkspiˈeɪʃən/ noun [noncount]
▪ expiation of his guilt/sin
/ˌɛkspiˈeɪʃən/ noun [noncount] ▪ expiation of his guilt/sin
