|Noah Webster's Dictionary|
1. (n.) A tendon or tendinous tissue. See Tendon.
2. (n.) Muscle; nerve.
3. (n.) Fig.: That which supplies strength or power.
4. (v. t.) To knit together, or make strong with, or as with, sinews.
Int. Standard Bible Encyclopedia
sin'-u (gidh (Job 10:11, etc.)): The tendons and sinews of the body are uniformly (7 times) thus called. "Therefore the children of Israel eat not the sinew of the hip which is upon the hollow of the thigh, unto this day: because he touched the hollow of Jacob's thigh in the sinew of the hip" (Genesis 32:32). In the poetical description of Behemoth (hippopotamus) it is said: "He moveth his tail like a cedar: the sinews of his thighs are knit together" (Job 40:17). The prophet Ezekiel saw in his vision (37:6, 8) that the dry bones were gathered together, that they were covered with sinews, flesh and skin, and that they were revived by the spirit of the Lord. In figurative language the neck of the obstinate is compared to an "iron sinew" (Isaiah 48:4). the King James Version "my sinews take no rest" (we`oreqay lo' yishkabhun, Job 30:17) has been corrected by the Revised Version (British and American) into "the pains that gnaw me take no rest," but the earlier version has been retained in the margin.
H. L. E. Luering
Sinew (2 Occurrences)
Genesis 32:32 Therefore the children of Israel don't eat the sinew of the hip, which is on the hollow of the thigh, to this day, because he touched the hollow of Jacob's thigh in the sinew of the hip. (WEB KJV JPS ASV DBY WBS YLT NAS RSV)
Isaiah 48:4 Because I knew that you are obstinate, and your neck is an iron sinew, and your brow brass; (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)