"More defunctive" means becoming less functional or active than before. Its antonyms include "productive," "active," "functional," "prosperous," and "viable." When a system or organization is functional, it means it is operational and performing its intended function efficiently. On the other hand, a defunctive system or organization has stopped functioning and is no longer able to perform its purpose. The opposite of defunctive is productive - when something is productive, it is capable of producing, providing yields, and adding value. Therefore, the antonyms for "more defunctive" are words that describe the opposite, focusing on things that are useful and functional.