A-riddan
Bosworth & Toller Anglo-Saxon Old English Dictionary - a-riddan
According to the Old English Dictionary:
ðú -riddest [a-, riddan]
- a-riddan
- To rid, deliver; liberare, repellere :-- -For hwý me ðú ædrífe oððe ariddest quare me reppulisti ? Ps. Spl. T. 42, 2.