plant

The root plant hides one of Latin's neatest little surprises: the same word, planta, meant both a young seedling and the sole of your foot. How can one word mean two such different things? Picture a Roman farmer. To set a fragile new shoot into the soil, he places it in the hole and then presses the earth down firmly around it — with the sole of his foot. The seedling and the foot that plants it shared a name because they shared a moment: the instant a plant is pressed into the ground.

From that image came the verb plantāre, 'to set in the ground.' Everything in this family grows out of that single action — putting something firmly into place.

- plant itself traveled the furthest. First it was the living thing you set in soil (a plant). Then it became the act of doing so (to plant seeds). Then, by a bold leap, it named a place where heavy equipment is 'set down' and fixed in one spot — a factory, a power plant, a manufacturing plant. And in a sneakier sense, to plant evidence or plant an idea is to set it secretly in place where it will be 'found.'
- plantation = a place where things are set out to grow on a large scale: a sugar plantation, a tea plantation.
- trans- (across) + plantāre → transplant: lift something out and set it down across, in new ground — a seedling moved to a bigger pot, or a kidney moved into a new body.
- im- (in) + plantāre → implant: set something into — a tooth implant fixed into the jaw, or values implanted in a child's mind.
- sub- (under) + plantāre → supplant: here the foot meaning takes over. To supplant originally meant to stick your foot under someone and trip them up — and from tripping a rival came the modern sense: to push someone out and take their place.

One odd member: eggplant. Nothing to do with planting — early European varieties were small, white, and egg-shaped, so English speakers literally called the plant the 'egg-plant.' The plant here is just the ordinary word for a growing thing.

The thread through the whole family is the farmer's gesture: take something, set it firmly in place, press it down. Whether it's a seedling, a factory, an organ, an idea, or a rival you're shoving aside, plant is always about putting something into position.