The word "most faddish" refers to something that is popular or trendy for a short period of time. The antonyms for this word include classic, timeless, enduring, traditional, and evergreen. These words describe things that are not influenced by fads or short-lived trends and instead have stood the test of time. Classic items or styles are always fashionable and never go out of style. Timeless things are unaffected by changes in fashion or society and remain relevant throughout the ages. Enduring objects, designs, or ideas last for a very long time and are not affected by temporary changes in taste. Traditional items are deeply rooted in history, culture, or customs and are handed down from generation to generation. Finally, evergreen things are always fresh, upbeat, and interesting, and remain steadfast without losing their charm.