The word "un-looses" refers to the action of tightening or securing something. Its antonyms are words that denote the opposite action, such as "loosen," "unfasten," "unclasp," "untighten," and "release." These words signify the act of relaxing or letting go of something that has been held tightly. For instance, you can loosen the knots on a rope to untie it, unfasten a belt to remove it, or release the grip on a jar lid to open it. Hence, having knowledge of antonyms is useful when expressing a contrary or contradictory meaning to a phrase or term.