The word "un-marred" refers to something that is flawless, undamaged or unspoiled. Its antonyms would be words that describe something that is not perfect, tarnished or ruined. Examples of antonyms for "un-marred" are blemished, damaged, flawed, flawed, imperfect, impaired, marred, scratched, and spoiled. These words refer to something that has been altered or affected in a negative way, either physically or emotionally. The opposite of un-marred could also be described as being marked by something, such as age or the passage of time. These antonyms all represent different ways in which something can lose its original un-marred quality.