—n.
1 a metal loop or link, closed by a bolt, to connect chains etc.
2 a fetter enclosing the ankle or wrist.
3 (usu. in pl.) a restraint or impediment.
—v.tr. fetter, impede, restrain.
Phrases and idioms:
shackle-bolt
1 a bolt for closing a shackle.
2 a bolt with a shackle at its end.
Etymology: OE sc(e)acul fetter, corresp. to LG shaumlkel link, coupling, ON skoumlkull wagon-pole f. Gmc
Useful english dictionary. 2012.