Firenlíce

According to the Old English Dictionary:

firenlíce

Add: flagitiously, criminally, grossly (of sinning) :-- For his fulum UNCERTAIN dǽdum þe hé fyrnlíce geedlǽhð, Hml. Th. ii. 380, 13. Hé geclǽnsod hæfde ꝥ hálige templ fram eallum þám fýlðum þe hé fyrnlíce þǽr árǽrde, Hml. S. 25, 538. firenlice