Castle-guard /(?)/

Cas·tle-guard

Castle-guard

n.
  1. The guard or defense of a castle.
  2. A tax or imposition an a dwelling within a certain distance of a castle, for the purpose of maintaining watch and ward in it; castle-ward. (O. Eng. Law)
  3. A feudal tenure, obliging the tenant to perform service within the realm, without limitation of time.