to set free (something mewed up); release, as from confinement
Word origin
[1810–20; un-2 + mew3]This word is first recorded in the period 1810–20. Other words that entered Englishat around the same time include: dominance, duplex, dynamic, liberalism, triangulationun- 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)