Wordnet 3.0
VERB (1)
1. 
 give up in the face of defeat of lacking hope; 
 admit defeat; 
- Example: "In the second round, the challenger gave up"[syn: drop out, give up, fall by the wayside, drop by the wayside, throw in, throw in the towel, quit, chuck up the sponge]
WordNet (r) 3.0 (2006):
fall by the wayside
    v 1: give up in the face of defeat of lacking hope; admit
         defeat; "In the second round, the challenger gave up" [syn:
         drop out, give up, fall by the wayside, drop by the
         wayside, throw in, throw in the towel, quit, chuck
         up the sponge] [ant: enter, participate]