Unflecked refers to something that is clean, unmarked, and flawless. The antonyms of unflecked are typically words that describe things that are marked or imperfect. These antonyms include words like dirty, soiled, flawed, marked, sullied, blemished, and tarnished. Some other antonyms of unflecked include marred, stained, damaged, discolored, scratched, and contaminated. Whether you are describing a surface or a personality trait, there are numerous antonyms for unflecked that accurately describe things that are not perfect or pristine. By using the appropriate antonym, you can better convey the intended meaning and make your writing more precise and engaging.