To make taut; to tauten, to tighten.
Under tension, like a stretched bowstring, rope, or sail; tight.
(of a body, muscles, etc.) Not flabby; firm, toned; (of a person) having a lean, strong body.
(of music, writing, etc.) Containing only relevant parts; brief and controlled.
Experiencing anxiety or stress.
(of a sailor, a ship, etc.) Neat and well-disciplined; (by extension) efficient and in order.
Strong; uncompromising.