Shackle

1. Stubble.
   

1. Something which confines the legs or arms so as to prevent their free motion; specifically, a ring or band inclosing the ankle or wrist, and fastened to a similar shackle on the other leg or arm, or to something else, by a chain or a strap; a gyve; a fetter.
2. Hence, that which checks or prevents free action.
3. A fetterlike band worn as an ornament.
4. A link or loop, as in a chain, fitted with a movable bolt, so that the parts can be separated, or the loop removed; a clevis.
5. A link for connecting railroad cars; -- called also drawlink, draglink, etc.
6. The hinged and curved bar of a padlock, by which it is hung to the staple.
Shackle joint (Anat.),
a joint formed by a bony ring passing through a hole in a bone, as at the bases of spines in some fishes.

1. To tie or confine the limbs of, so as to prevent free motion; to bind with shackles; to fetter; to chain.
2. Figuratively: To bind or confine so as to prevent or embarrass action; to impede; to cumber.
3. To join by a link or chain, as railroad cars.
Shackle bar ,
the coupling between a locomotive and its tender.
Shackle bolt ,
a shackle.