The word "unrestrict" refers to a lack of limitation or constraint. Its antonyms, on the other hand, describe various degrees of constraint, limitation, or obstruction. Some antonyms of "unrestrict" include restrict, limit, confine, hinder, block, prohibit, and forbid. These words suggest boundaries and restrictions that may prevent free movement, operation or thought. For example, a restrictive law or policy may limit people's freedom, while a blocked road may hinder their transportation. Antonyms of "unrestrict" can help in specifying the degree of control or freedom that is desired or required in a particular context.