The antonyms for the word "more mirrorlike" include dull, uneven, rough or opaque. While a mirror is reflective and provides a clear image of the object, surface or person in front of it, an uneven or rough surface diffuses the light and breaks it up, bending it in different directions, resulting in a distorted or unclear image. Similarly, an opaque surface completely reflects the light without allowing it to pass through, giving no reflection at all. A dull surface, on the other hand, reflects light poorly, resulting in a muted, less vibrant appearance.