from The Century Dictionary and Cyclopedia
- n. A bolt having a shackle or clevis on the end.
- n. A bolt which is passed through the eyes of a clevis or shackle.
- n. A shackle. Also shack-bolt.
- n. In heraldry, a bearing representing a fetlock for hobbling a horse. Compare spanceled. Also called prisoner's-bolt.
Sorry, no etymologies found.
When I knocked the shackle-bolt loose, the chain roared out through the hawse-hole and into the sea.
"A fetterlock and shackle-bolt [Footnote: These are terms in heraldry.
Footnote: _Derring-do_ is an old word for daring, or _warlike deed_] A fetterlock, and a shackle-bolt on a field sable -- what may that mean?