unclench

un·clench

 (ŭn-klĕnch′)
v. un·clenched, un·clench·ing, un·clench·es
v.tr.
To loosen from a clenched position; relax: unclench one's fists.
v.intr.
To become unclenched.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

unclench

(ʌnˈklɛntʃ)
vb (tr)
to open (clenched teeth, a clenched fist, etc)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Translations

unclench

[ˈʌnˈklentʃ] VTaflojar
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
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She struggled for self-control, and I saw her hands clench and unclench spasmodically.
Tug as he would at the old man's wrists, the hangman could not force him to unclench his hands.
His fingers clenched and unclenched spasmodically as he approached the trembling Russ, beastlike and ominous as a brute of prey.
His face flushed, his jaw set, and unconsciously his hand clenched, unclenched, and clenched again as if he were taking fresh grips upon some hateful thing out of which he was squeezing the life.
While he was collecting a few necessaries and cramming them into his pockets, he never once ceased communing with himself in a low voice, or unclenched his teeth, which he had ground together on finishing Miss Brass's note.
He leaned forward staring at me, slowly unclenched his hand and drew it across his mouth as if his mouth watered for me, and sat down again.
And most importantly, will there be any more chainsaw action or can I unclench my fingers from this cushion?
Slowly unclench your fist into its original position.
During your donation you'll be encouraged to clench and unclench your fists to encourage blood flow.
The deal - which was built on a framework first hammered out in April - is Obama's crowning foreign policy achievement six years after he told Iran's leaders that if they "unclench their fist, they will find an extended hand from us." It also the fruit of Rouhani's attempts since his election in 2013 to end Iran's isolation 35 years after the Islamic revolution.
I discussing going back to nurse singing a lullaby The magic of this recreation is that visitors can touch stuff - sit on the beds, read the medical notes clipped to them - and parents can unclench their buttocks, happy in the knowledge junior can't destroy priceless artefacts.
NHS Blood and Transplant vehicle During your donation you'll be encouraged to clench and unclench your fists to encourage blood flow.