Synonyms for loosen in Free Thesaurus. loosen-up | definition: cause to become unblocked | synonyms: disengage, unblock, unstuff, free| antonyms: stuff, obstruct, thin, freeze, alkalize To make looser or less tight: loosened his tie; loosened her grip on the rope. Quiz Review. This is the British English definition of loosen up.View American English definition of loosen up.. Change your default dictionary to American English. Find more ways to say loosen up, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. 2. loosen up definition: 1. to stretch your muscles, esp. Drag the correct answer into the box. Here you use the synonyms for loosen up. Definition and synonyms of loosen up from the online English dictionary from Macmillan Education.. by doing special exercises before a hard physical activity: 2. Synonyms (Other Words) for Loosen up & Antonyms (Opposite Meaning) for Loosen up. Thesaurus for loosen up from the Collins English Thesaurus. Synonyms for Loosen Up (other words and phrases for Loosen Up) - Page 2. Another word for loosen up. In this usage, a noun or pronoun can be used between "loosen" and "up." 2. Find more similar words at wordhippo.com! 1. If those shoes are stiff right now, just give them time—they'll loosen up. loosen up 1. Another way to say Loosen Up? Literally, to become looser, less tight, or less restricting. New from Collins Quick word challenge. Learn more. Synonyms-thesaurus.com is more than 70,800 synonyms and 47,200 antonyms available. Antonyms for loosen. Question: 1 - Score: 0 / 5. advice or advise? Search loosen up and thousands of other words in English definition and synonym dictionary from Reverso. To make something looser, less tight, or less restricting. Synonyms for loosen up include exercise, limber up, prepare, stretch, warm up, practise, practice, get ready, work out and get into shape. These synonyms for the word loosen up … To…. Related terms for 'loosen up': burn off, exercise, firm up, hold, jog, limber up, pump iron, sculpt, touch your toes, warm up, work out ens v. tr. Thanks, that massage really loosened up my shoulders.