to untie or loosen (something lashed, or tied with a rope, etc.)
unlash in American English
(unˈlæʃ)
transitive verb
to loosen, unfasten, or detach, as something lashed or tied fast
Word origin
[1740–50; un-2 + lash2]This word is first recorded in the period 1740–50. Other words that entered Englishat around the same time include: ensemble, kingfish, materialism, outrigger, picnicun- is a prefix freely used in English to form verbs expressing a reversal of some actionor state, or removal, deprivation, release, etc. (unbend; uncork; unfasten; etc.), or to intensify the force of a verb already having such a meaning (unloose)