The word "unrestrained" is used to describe a situation where someone or something is not held back, limited or controlled. The opposite or antonyms of unrestrained include restricted, restrained, controlled, limited, inhibited, and self-controlled. Where "unrestrained" denotes freedom and lack of control, "restricted" means that someone or something is held back, limited, or bound by boundaries, rules, or regulations. "Controlled" and "self-controlled" describe a situation where there is monitoring or regulation to ensure that actions or behaviors are within acceptable limits without excess or uncontrollable. "Inhibited" and "restrained" also suggest a lack of freedom or limitation. Ultimately, the opposite of "unrestrained" is a sense of confinement or restraint.