Originally implying ‘ similarly, intensity,’ from OIA. « rūpa » form, shape gt; MIA. « -rūva », this affix is generally used pleonastically in NIA. in which it occurs in only a few words : e.g., ^(#42;)গোরূ gt;গোরু, « ^(#42;)gō-rū gt; gō-ru » ox, cow, cattle,[…]
Source: wiktionary