Unloose/ˌʌnˈluːs/ Definition 1 of 2Pro Tip 1/3Physical Actions Often used when referring to the physical act of loosening something tight. Could you help me unloose these shoelaces? Pro Tip 2/3Limited Figurative Use Rarely used in a figurative sense, unlike its synonym 'loosen'. The author's use of humor helped unloose the tension in the room. Pro Tip 3/3Not Commonly Used It's less common in modern English and can sound archaic; 'untie' or 'loosen' are often preferred. He was struggling to unloose the ropes.