Strong's #2841: chashrah (pronounced khash-raw')
from the same as 2840; properly, a combination or gathering, i.e. of watery clouds:--dark.
Brown-Driver-Briggs Hebrew Lexicon:
ׁ
chashrâh
1) collection, mass, an accumulation of water
Part of Speech: noun feminine
Relation: from the same as H2840
Usage:
This word is used 1 times:
2 Samuel 22:12: "darkness pavilions round about him, dark waters, and thick clouds of the skies."