Un-widere
Bosworth & Toller Anglo-Saxon Old English Dictionary - un-widere
According to the Old English Dictionary:
es;
- un-widere
- n. Bad weather, tempest :-- Ús unwidera weoldon unwæstma, Wulfst. 129, 4: 159, 12 note. [O. H. Ger. un-witari tempestas.]