Mægen-róf

According to the Old English Dictionary:

mægen-róf

adj. Of great power:--Módig and mægenróf mid ðære miclan hand (applied to God), Cd. 156; Th. 195, 11; Exod. 275. Þegn, mægenrófa man, Exon. 109 b; Th. 419, 9; Rä. 38, 3. mægen-rof