The antonyms for the word "most mirrorlike" are mainly words that describe qualities which are opposite or different from the reflective, polished surface of a mirror. Some of the relevant antonyms include rough, matt, grainy, dull, porous, bumpy, uneven, rusty, tarnished, and worn out. Moreover, the term "mirrorlike" also implies a sense of clarity, symmetry, and accuracy, so antonyms that convey the opposite meanings can be words like blurred, distorted, asymmetric, vague, incomplete, inaccurate, imprecise, or fuzzy. In essence, the antonyms for "most mirrorlike" connote a deviation from the ideal of a crystalline, pristine, and gleaming surface, indicating imperfections, irregularities, or flaws.