עָב (av)

The Hebrew noun av refers to a dark, dense cloud or a thick mass of vapor. Its primary sense is not just visibility but weight and opacity, describing something that blocks light or covers the sky. In the Psalms and Prophets, this imagery often accompanies divine presence, such as when God descends in storm clouds (Psalm 18:11) or when darkness shrouds judgment (Job 22:14). The word captures a sense of mystery and power, emphasizing the overwhelming nature of what is hidden within the cloud.

Beyond meteorological descriptions, av also denotes a thicket or copse, likely because dense foliage creates a similar kind of shadowed refuge. This dual meaning links the physical density of trees with the atmospheric density of storm clouds. In Ecclesiastes 11:3, the phrase "if the clouds are full" uses this concept to illustrate how life’s outcomes remain hidden until they fall, much like rain from a heavy cloud or fruit from a dense branch.

Translators sometimes render av as "clay" in specific contexts, such as 2 Chronicles 4:17, where the text describes casting pillars in "thick clay." Here, the sense of compactness and density carries over from the cloud imagery to describe solid, heavy earth. This usage highlights how Hebrew thought connected atmospheric phenomena with earthly materials through shared qualities of weight and opacity.