Boyd’s Bible Dictionary:
(whirling). Abundant in the wastes of Palestine, Arabia, and Egypt. Used much figuratively. Innumerable multitudes (Gen. 32:12); abundance (Gen. 41:49); weight (Job 6:3; Prov. 27:3); sea boundary (Jer. 5:22); hiding place (Ex. 2:12; Deut. 33:19).
Strong’s Dictionary of Hebrew Words:
Meaning:
from 2342; sand (as round or whirling particles)