sinewy

Tough; having strong sinews.

• I haue beene wooed, as I intreat thee now, Euen by the ſterne, and direfull God of warre, VVhoſe ſinowie necke in battel nere did bow, VVho conquers where he comes in euery iarre; […]
• His right hand (which seemed to me somewhat hairy and sinewy, a sign of great strength in its owner) lay on the side of his heart; […]

Having or showing nervous strength.figuratively

Possessing physical strength and weight; rugged and powerful.

• Worthy fellows, and like to prove most sinewy swordmen
• Hawat put a sinewy finger beside his eye.