Verbs

(v)drop out, give up, fall by the wayside, drop by the wayside, throw in, throw in the towel, quit, chuck up the spongegive up in the face of defeat of lacking hope; admit defeat“In the second round, the challenger gave up”
(v)drop outwithdraw from established society, especially because of disillusion with conventional values“She hasn't heard from her brother in years — he dropped out after moving to California”
(v)drop outleave school or an educational program prematurely“Many students drop out because they are not prepared for our challenging program”