The Collaborative International Dictionary of English v.0.48:

Belock \Be*lock"\ (b[-e]*l[o^]k"), v. t. [imp. & p. p.
   Belocked (b[-e]*l[o^]kt").] [Pref. be- + lock: cf. AS.
   bel[=u]can.]
   To lock, or fasten as with a lock. [Obs.] --Shak.
   [1913 Webster]