"More nonfunctional" can be described with several antonyms such as functional, efficient, productive, useful, practical, effective, and operative. While the word "nonfunctional" implies something that doesn't work or doesn't serve its intended purpose, the opposite terms depict things that are useful, practical, and effective. Functional and efficient mean that something works efficiently without any glitches or problems. Productive and useful are terms that refer to something that can be used to achieve a particular purpose. Lastly, practical and operative denote something that can be applied and executed to effectively achieve desired results. By using these antonyms, we can better understand the concept of "more nonfunctional.