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Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   甲斐 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, 詮 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 効 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, かい /kˈäi/
   (noun (common) (futsuumeishi))
   甲斐・がいeffect, result, worth, use, avail