wrenching wrenc·hing UK/ˈɹɛnt͡ʃɪŋ/ US/ˈrɛntʃɪŋ/ uncommon adjective 1. causing great physical or mental suffering “a wrenching pain” Synonymsracking Similarpainful WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.