fast-moving: swift, fleet, able to cover ground in a hurry
This adjective comes from a root about lightness, and the connection is easy to feel: a light body carrying a light load moves fast. In use, though, the Bible almost never asks how much something weighs. It asks how quickly something can arrive, and whether it can get away.
Speed shows up most often in scenes of pursuit and escape, and almost always as bad news:
- Amos says twice that being fast will save nobody on the day God settles accounts.
- Jeremiah tells a routed army by the Euphrates that the fast man will not escape.
- Ecclesiastes observes that the race does not go to the fast.
- Lamentations remembers pursuers who were faster than eagles overhead.
The one straightforward compliment, Asahel being as fast as a gazelle in open country, is also the setup for his death a few verses later.
Beyond people, the word describes whatever carries something along quickly: the horses Judah wanted to flee on, a young camel running loose in every direction, and the cloud God rides into Egypt. Twice it works as a plain word for how fast something comes, standing next to another word for haste (מְהֵרָה) so that the two together hammer the point.
Isaiah 30:16 turns the word back on the people who used it. They boast that they will ride on fast horses, and the prophet answers that their pursuers will be just as fast, using the matching verb (קָלַל). That verb ranges much wider, from moving quickly all the way to treating someone as worthless, but the adjective stays with speed.