The antonyms for the phrase "more worn-down" are fresh, new, and pristine. These words describe something that is in excellent condition, has not been used much, or has just been recently acquired. Something that is fresh is recently made, and free from any signs of wear and tear. Similarly, something that is new has never been used before, and it's in perfect condition. Pristine refers to something that is in its original state, and it has been well-preserved. These antonyms are good to use when describing things that are the opposite of being "more worn-down," and they are beneficial in highlighting something's excellent condition, recent acquisition, or minimal use.