Definition of unclutch in US English:

unclutch

verb

  • with object To let go of (something held in the hand); to relinquish. Also: to relax or loosen (one's grip or tightly closed hand); to force open (a person's tightly closed hand).

Origin

Mid 17th century; earliest use found in George Wither (1588–1667), poet. From un- + clutch.