Mægen-rǽs
Bosworth & Toller Anglo-Saxon Old English Dictionary - mægen-rǽs
According to the Old English Dictionary:
es;
- mægen-rǽs
- m. A mighty or violent attack:--Mægenrǽs forgeaf hilde bille (Beowulf attacking Grendel's mother), Beo. Th. 3043; B. 1519. mægen-ræs