Wiþ-feolan

According to the Old English Dictionary:

wiþ-feolan

p. -fealh To apply one's self to:--Ðá hé ðá ongeat ðæt hé ðære godspellícan láre georne wiþfealh, and ða ðeóde tó Cristes geleáfan gecyrred hæfde qui ubi prosperatum ei opus evangelii comperit, Bd. 3, 22; S. 552, 43. wiþ-feolan