← BackshareGuessunclinches/ʌnˈklɪntʃɪz/verbTo release or loosen something that was held tightly, especially a fist or a grip.He unclinches his jaw after hearing the good news.She unclinches her fist when she finally relaxes.The mechanic unclinches the bolt with a wrench.SynonymsreleaseloosenAntonymsclench