Níþ-sele

According to the Old English Dictionary:

es ;

níþ-sele

m. A hall where one is exposed to the hatred of a foe :-- [Grein reads niþ-sele a hall low down, beneath the water.] Hé [in] níþsele náthwylcum wæs, ðǽr him nǽnig wæter wihte ne sceþede, Beo. Th. 3030; B. 1513. niþ-sele