tautest

adjective

1. 1.Under tension, like a stretched bowstring, rope, or sail; tight.
2. 2.(of a body, muscles, etc.) Not flabby; firm, toned; (of a person) having a lean, strong body.
3. 3.(of music, writing, etc.) Containing only relevant parts; brief and controlled.
4. 4.Experiencing anxiety or stress.
5. 5.(of a sailor, a ship, etc.) Neat and well-disciplined; (by extension) efficient and in order.