I thought RuneWord only work for "NON-MAGICAL" Items?? NO??? I dont think u can make a silence out of the magical Bow coz it has a +11% ed in it already.

From the Past:
I had a Godly Armor 980+ Def 3 sockets Indestructable
Was trying to make a runeword out of it but it didnt work...
I dont know.. Make sure that the bow can runeword it.. else u'll waste your ist and vex...