a sinew or tendon: now only in the phr. , to try as hard as possible
any of the cordlike fibers or bundles of fibers connecting the body organs with the central nervous system (the brain and the spinal cord) and parts of the nervous system with each other, and carrying impulses to and from the brain or a nerve center
the pulp of a tooth, including the nerves, blood vessels, etc.
emotional control; coolness in danger; courage: a man of nerve
strength; energy; vigor
the nervous system regarded as indicating health, emotional stability, endurance, etc.