(anatomy) A cord or tendon of the body. / A cord or string, particularly (music) as of a musical instrument. / (figuratively) Muscular power, muscle; nerve, nervous energy; vigor, vigorous strength.

(transitive) To knit together or make strong with, or as if with, sinews.

plural of sinew

Furnished with sinews. / (figuratively) Equipped; strengthened.

(obsolete) sinewy

present participle of sinew

(of a horse) Having the sinews under the belly shrunk by excessive fatigue.

money, seen as necessary to wage war effectively

Tough; having strong sinews. / (figuratively) Having or showing nervous strength. / (of a person or animal) Possessing physical strength and weight; rugged and powerful.

The state or condition of being sinewy.