Friþ-burh
Bosworth & Toller Anglo-Saxon Old English Dictionary - friþ-burh
According to the Old English Dictionary:
freoðo-burh;
- friþ-burh
- gen. -burge; dat. -byrig; f. A town with which one is at peace, one included in the 'friþ' or peace made between two parties; pācis urbs :-- Ðéh hit [the ship] gedriuen beó and hit ætfleó to hwilcre friþbyrig and ða menn útætberstan into ðære byrig ðonne habban ða men friþ though it be driven and it escape to any town with which ' friþ' has been made, and the men get away into the town, then let the men have protection, L. Eth. ii. 2; Th. i. 286, 1.