SIN'EW, noun 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, verb intransitive To knit as by sinews.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI