Here you will find one or more explanations in English for the word Unclutch.
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Unclutch
Unclutch Un*clutch", v. t. [1st pref. un- + clutch.]
1. To open, as something closely shut. ``Unclutch his griping
hand.' --Dr. H. More.
2. (Mech.) To disengage, as a clutch.
Meaning of Unclutch from wikipedia