The term "more unfading" implies something that is bright, enduring, and vivid over time. The opposite of this quality can be described using antonyms such as dull, fading, drab, uninspiring, and lackluster. Something that is characterized by these terms may not retain its color and appeal over time; it may become monotonous, bland, and uninspired. Furthermore, it may not be able to hold our attention or awaken our senses. Conversely, something that is "more unfading" is dynamic, enduring, captivating, and brilliant. In summary, the antonyms of this term embody qualities that are the opposite of what it stands for.