Grund-wang

According to the Old English Dictionary:

-wong, es;

grund-wang

m. The bottom, ground, floor, the earth :-- He ðone grundwong ongytan mihte he could perceive the bottom [of the lake], Beo. Th. 2996; B. 1496: 5533; B. 2770. Grundwong ofgyfan to give up the earth, to die, 5169; B. 2588. grund-wang