That which gives strength or in which strength consists; a supporting factor or member; mainstay.
A cord or tendon of the body.
A cord or string, particularly (music) as of a musical instrument.
Muscular power, muscle; nerve, nervous energy; vigor, vigorous strength.
To knit together or make strong with, or as if with, sinews.
The difference in electrostatic potential between two points in space, especially between live and neutral conductors or the earth.