Ge-þryþian

According to the Old English Dictionary:

ge-þryþian

p. ede; pp. ed [þryþ power, strength] To strengthen, arm; corroborare :-- Deáþ nimeþ wíga wælgífre wǽpnum geþryþed ealdor ánra gehwæs death, the blood-greedy warrior, armed with weapons, takes the life of every one, Exon. 62 b; Th. 231, 9; Ph. 486. ge-þryþian