Fremfullíce

According to the Old English Dictionary:

fremfullíce

Add: to profit or advantage :-- Drihten ealle gód him fremfullíce (to his profit) tówearde dyde, Lch. iii. 436, 22. Fremfullíce (only fremfi is left in MS.) effica[citer], R. Ben. I. 1, 5. [ꝥ drihten fulste me to seggen wat it bitocneð, and heu fremfulliche to understonden (to understand to your profit), O.E. Hml. ii. 175, 15.] fremfullice