unlash

from WordNet (r) 3.0 (2006)
unlash
    v 1: untie the lashing of; "unlash the horse" [ant: {lash}]
    
from The Collaborative International Dictionary of English v.0.48
Unlash \Un*lash"\, v. t. [1st un- + lash.] (Naut.)
   To loose, as that which is lashed or tied down.
   [1913 Webster]
    

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