All clench antonyms

verb clench

• relax — to make less tense, rigid, or firm; make lax: to relax the muscles.
• release — to lease again.
• loosen — to unfasten or undo, as a bond or fetter.
• unfasten — to release from or as from fastenings; detach.
• let go — to move or proceed, especially to or from something: They're going by bus.
• loose — free or released from fastening or attachment: a loose end.