Wiþerling

According to the Old English Dictionary:

es;

wiþerling

m. An adversary :-- Ðú forbriccest wiþerlingas (adversarios), Cant. Moys. Ex. 15, 7. [Iesu cristes wiþerling (wiþering, ed. Lum by), K. Horn 154 (ed. Ritson).] wiþerling