DuckCorp Dico

Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
    [ichi1]  弱 /(en)tʃˈaɪniːz(ja)lˈe̞tə/,  [ichi1] じゃく /dʑˈäkɯᵝ/
   1. (noun, used as a suffix)
   小・こ・2little less than, fewer than, under
   2. (noun (common) (futsuumeishi))
   weakness, the weak