re·nege 
/rɪˈnɛg, Brit rɪˈni:g/ verb
re·neges; re·neged; re·neg·ing /rɪˈnɛg, Brit rɪˈni:g/ verb [no obj] : to refuse to do something that you promised or agreed to do
▪ They had promised to pay her tuition but later reneged. — usually + on ▪ They reneged on their promise to pay her tuition.
▪ They had promised to pay her tuition but later reneged. — usually + on ▪ They reneged on their promise to pay her tuition.
