The antonyms for the word "un-taken" are "taken," "occupied," "claimed," and "used." Whereas "un-taken" means something that is available, not taken or not claimed, its antonyms are the opposite of it. Objects, spaces, land or properties can be taken, occupied, claimed or used by someone, leaving them not available for others. These antonyms can also be used to describe a booked or reserved item that is temporarily unavailable. For instance, a hotel room that is taken or occupied cannot be booked by anyone else. Using antonyms helps to clarify and emphasize the meaning of a particular word.