Norþ-sǽ

According to the Old English Dictionary:

norþ-sǽ

a northern sea :-- Norþsǽ mare arctoum, Wrt. Woc. i. 41, 66. Of Japhet com ðæt norþerne mennisc be ðære norþsǽ, Ælfc. T. Grn. 4, 38. Án geweorc on Defnascíre be ðære norþsǽ, Chr, 894; Erl. 91, 8. [Icel. norðr-sjór.] norþ-sæ