The word "unloosed" is a verb that means to release or untie something that was previously restrained or restricted. Therefore, its antonyms are words that suggest restraints or limitations. Some antonyms for "unloosed" are "fettered," which means to be bound or restrained, "clasped," which means to be held together or secured, and "fastened," which means to be firmly attached or fixed. Other antonyms that can be used with "unloosed" include "captured," "confined," "detained," "restricted," or "tethered." These words evoke a sense of limitations and confinement, whereas "unloosed" suggests freedom and liberation.