Artificial intelligent assistant

shackbolt

shackbolt Her.
  (ˈʃækbəʊlt)
  [? Shortened from shackle-bolt: see shackle n.]
  A shackle or fetter used as a charge.

1610 J. Guillim Heraldry iv. xvii. (1660) 349 He beareth, Argent, a Shackboult sable. 1656 Blount Glossogr., Shack⁓bolt or Shackle, a prisoners Bolt, a Fetter or Give. 1688 [see shackle-bolt]. 1712 Lond. Gaz. No. 4973/4 A Lion's Head erased in a S[h]ackbolt on a Wreath. 1868 Cussans Handbk. Her. vii. (1893) 115 Fetter-lock, or Shack-bolt: a somewhat rare Charge.

Oxford English Dictionary

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