The term "un loosened" suggests that something is tight or secure. Therefore, the antonyms for this word would be synonymous with openness, looseness, or freedom. Antonyms for "un loosened" include "unfastened," "unlocked," "unleashed," "released," or "loose." If something is described as unloosened, it may appear to be rigid or unbending, so antonyms such as "flexible," "pliable," or "supple" may also be appropriate. Overall, antonyms for "un loosened" suggest a sense of liberation or ease, as opposed to a feeling of constraint or restriction.