KJV Dictionary Definition: sinew
1. In anatomy, a tendon; that which unites a muscle to a bone.
2. In the plural, strength; or rather that which supplies strength. Money is the sinews of war.
3. Muscle; nerve.
SIN'EW, v.i. To knit as by sinews.
1. Furnished with sinews; as a strong-sinewed youth.
2. Strong; firm; vigorous. When he sees ourselves well sinewed to our defense.