drop out
verb.
give up in the face of defeat of lacking hope; admit defeat
In the second round, the challenger gave up
Synonym: chuck up the sponge, drop by the wayside, fall by the wayside, give up, quit, throw in, throw in the towel
verb.
withdraw 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
verb.
leave school or an educational program prematurely
Many students drop out because they are not prepared for our challenging program
Antonym: enter