To set free from or as if from restraints.(verb-transitive)
To relax: unloosed my grip on the handlebars. (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unloose" in a sentence
"If there is a vulture whose claws are hard to unloose from the vitals of the spirit, I think it is jealousy."
"Mr. Baxter makes an acute connection between meanness and the raw pleasure it can unloose."
"She oozes over the crunk fireworks display that is "Ribbon" (my personal favorite), "You make me feel so unloose.""