Kennings for Sky

How shall the sky be referred to? By calling it Ymir’s skull and
hence giant’s skull and toil or burden of the dwarfs or helmet of
Vestri and Austri, Sudri, Nordri, land of sun and moon and stars,
constellations and winds, helmet or house of air and earth and
sun. Amor the earls’ poet said this:

Never will as generous a young ruler step on to shield-plank
[ship] — this prince’s magnificence was ample — under
Ymir’s old skull.

And as he also said:

The bright sun will become a black one, earth will sink into
dark sea, Austri’s toil will split, all the sea will crash on the
fells.


- Prose Edda, Skaldskaparmal