The term "un-chain" refers to the act of releasing something or someone from chains, constraints, or restrictions. In contrast, the antonyms of un-chain include the words bind, confine, restrict, and restrain. These words imply limiting something's freedom or movement, either through physical or mental means. To bind something involves tying it up and immobilizing it, while confining implies restricting its movements within a limited space. Restricting or restraining something involves putting limits on its actions or abilities. Therefore, antonyms of un-chain describe actions that bind or restrict, rather than liberate.