Un-workable is a term used to describe something that cannot be used, implemented or applied effectively. The opposite of unworkable could be workable, feasible, practical, or executable. These antonyms represent something that is viable, achievable and can be implemented successfully. A workable solution is often the result of brainstorming, research and effort put into finding the best solution to a problem. Workable ideas and solutions are the ones that can be implemented without any hassle, are efficient and yield the best results without causing unwarranted issues. Hence, when tackling a problematic situation, it's always recommended to search for workable solutions rather than settling for unworkable ones.