how does the translator's use of alliteration make this description of the underwater lair of grendels mother more effective?

"They live in secret places, windy

Cliffs, wolf-dens where water pours

From the rocks, then runs underground, where mist Steams like black clouds, and the groves of trees Growing C>U!. over their lake are all covered

With frozen spray, and wind down snakelike

Roots that reach as far as the water

And help keep it dark.

Are these the lines in question?

Yes