a horse: the swift, powerful animal harnessed for war, royal travel, and trade
Across the Hebrew Bible this word names the horse, almost always the warhorse. Israel met the horse first as the weapon of empire: the chariot teams of Egypt drowned in the sea, the cavalry of Assyria, Babylon, and Persia. So the horse in Scripture is rarely a farm animal and almost never simply transport; it is the concentrated image of military might and the speed and force that come with it.
That single picture stretches in a few directions without ever becoming a different word. The horse is the prized possession of kings (Solomon's stables, the king's own mount), the engine of an army's chariotry, and a standard unit of wealth traded between nations. Prophets and poets keep returning to it as the thing nations trust instead of God: to "rely on horses" is to stake your safety on armed strength, and the verdict is always that the horse is a false security, swift but unable to save.
Because its force and speed are so vivid, the horse also becomes a ready comparison. People are likened to it for raw drive (a stallion in heat), for stubbornness that needs bit and bridle, or for the thunder of a charge. In the night visions of Zechariah and the burning chariot that takes Elijah, horses cross into the symbolic and heavenly, but the underlying animal is the same familiar warhorse.