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