unclench definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
transitive verb, intransitive verb
to open: said of something clenched, or clinched
unclench definition by American Heritage Dictionary
verb un·clenched, un·clench·ing, un·clench·es verb, transitive
To loosen from a clenched position; relax: unclench one's fists.verb, intransitive
To become unclenched.