Princeton's WordNet

1. drop out, give up, fall by the wayside, drop by the wayside, throw in, throw in the towel, quit, chuck up the sponge(verb)

   give up in the face of defeat of lacking hope; admit defeat

   "In the second round, the challenger gave up"

Wiktionary

1. fall by the wayside(Verb)

   To fail to be completed, particularly for lack of interest; to be left out.

• agterlaatAfrikaans
• يَفْشَل، يَتْرُك، يَتَخَلّى عنArabic
• отпадамBulgarian
• ser abandonado / forçado a fracassarPortuguese (BR)
• padnout, neuspětCzech
• unter den Tisch fallenGerman
• ikke blive til nogetDanish
• αποτυγχάνω, εγκαταλείπομαι (για σχέδια, ιδέες κτλ.)Greek
• quedarse en la estacada; venirse abajo, fracasarSpanish
• läbi kukkumaEstonian
• شكست خوردنFarsi
• epäonnistuaFinnish
• rester en planFrench
• לִזנוֹחַHebrew
• नाकाम रहनाHindi
• propastiCroatian
• megbukikHungarian
• gagalIndonesian
• misheppnastIcelandic
• fallireItalian
• 捨てられるJapanese
• 중도에 포기하다Korean
• mesti, palikti, nepasisektiLithuanian
• atkrist; izrādīties nederīgs/nesekmīgsLatvian
• gagalMalay
• terzijde geschoven wordenDutch
• gi opp, mislykkesNorwegian
• zostać zarzuconymPolish
• شكست خوردنPersian
• شکست خورلPashto
• ser abandonadoPortuguese
• a fi abandonat; a aban­do­na (un proiect, o idee)Romanian
• потерпеть неудачуRussian
• neuspieťSlovak
• opustitiSlovenian
• propastiSerbian
• stranda, lägga ner, övergeSwedish
• ล้มเลิกกลางคันThai
• havlu atmakTurkish
• 半途而廢，失敗Chinese (Trad.)
• виявитися нереальнимUkrainian
• ناکام ہو جاناUrdu
• bị bỏ rơiVietnamese
• 半途而废，离弃Chinese (Simp.)