pinion

1. (transferred sense, figurative) To restrain; to limit.Examples: "Know, sir that I / Will not wait pinion'd at your master's court, / Nor once be chastis'd with the sober eye / Of dull Octavia."; "I was suddenly seized from behind and thrown to earth. As I fell, a warm body fell on top of me, and hands grasped my arms and legs. When I could look up, I saw a number of giant fingers pinioning me down, while others stood about surveying me."; "I am pinioned by a chain of reasoning! Why else do his four friends conspire to conceal […]"

1. (mechanical engineering) The smallest gear in a gear train.Examples: "1844, Edgar Allan Poe, The Premature Burial A certain period elapses, and some unseen mysterious principle again sets in motion the magic pinions and the wizard wheels."; "The usual front sprocket has teeth, which which mesh into a pinion on a shaft that carries power to the wheel through a pair of pinions at the rear."; "The spiral bevel pinion has 19 teeth, a diametral pitch of 6.940 teeth/inch, a face width of 1.28 inch, a bevel angle of 15 degrees 16 minutes, and a spiral angle of 30 degrees left hand, clockwise."