Ge-unlybba
Bosworth & Toller Anglo-Saxon Old English Dictionary - ge-unlybba
According to the Old English Dictionary:
an;
- ge-unlybba
- m. Poison [particularly when used in witchcraft] :-- Ne lǽt ðú lybban ða ðe geunlybban wyrcon thou shalt not suffer a witch to live, Ex. 22, 18.