Ge-fælsian

According to the Old English Dictionary:

ge-fælsian

p. ode, ade; pp. od, ad To cleanse, purify, expiate; lustrāre, pūrĭfĭcāre, expiāre :-- He wolde gefælsian foldan mǽgþe he would purify the race of earth, Exon. 10 a; Th. 9, 33; Cri. 144 : 12 b; Th. 20, 19; Cri. 320. Heorot is gefælsod Heorot is purified, Beo. Th. 2357; B. 1176 : 3245; B. 1620 : Apstls. Kmbl. 132; Ap. 66. Fýre gefælsad purified with fire, Exon. 127 b; Th. 490, 21; Rä. 80, 5. ge-fælsian