马 is a pictograph, the simplified shape of 馬: a single horse drawn in profile and pared down to three strokes. The full traditional form keeps the picture legible. Its top reaches up where the head and flowing mane once stood, the central body carries a row of short strokes that were the four galloping legs, and the long tail sweeps off below. Slow the eye down across 馬 and the animal reassembles itself: ears pricked, neck arched, hooves striking the ground.

The oracle-bone graph is one of the most vivid in the whole script. Scribes of the Shang drew a recognizable horse standing tall, the great eye and tossing mane marked with care, because the horse was a prestige animal, the engine of the war chariot and the hunt. Through bronze and seal forms the legs and mane stiffened into the rungs and hooks you still see in 馬, until the modern simplification collapsed those four leg-dots into a single sweeping bottom stroke and gave us today's 马.

From the live animal the character reached outward by metaphor. A horse is the fastest thing in the old world, so 马上 (mǎshàng), literally "on horseback," came to mean "at once, right away." A road wide enough for horses is a 马路 (mǎlù), the everyday word for a paved street. Anything horse-shaped or horse-sized borrows the word too, from the wooden 木马 (mùmǎ) of the playground to the saddle-shaped knight in Chinese chess.

马 is also one of the commonest Chinese surnames, carried by tens of millions, and it stands as a radical in its own right under which every horse-related character is filed. In Japanese the same graph reads uma or ba; in Korean it is ma. Wherever the script traveled, the horse cantered along with it.

Picture a single galloping horse seen from the side at dusk. Its head and mane rise up the left edge of the frame, the long tail streams off the bottom right, and the whole body is caught mid-stride in just three brushstrokes of motion. That blur of speed is 马. The full form 馬 is the same horse drawn slowly, with every leg and hair in place; the simplified 马 is the same horse at full gallop, too fast for detail.

Hold the speed and the compounds fall out on their own. To be 马上 (mǎshàng) is to be already on that horse, a heartbeat from arriving. To do something 马虎 (mǎhu) is to gallop past the work without stopping to look, leaving a sketch that could be horse or tiger. And when the horses finally reach the field, 马到成功, the victory is already won.