Most burnished refers to an object or surface that has been highly polished or buffed to a shining finish. The antonyms for this term would be words that describe a surface that is dull, rough, or unpolished. These words could include: tarnished, dull, grubby, dirty, gritty, rough, or unfinished. A tarnished surface would be one that has lost its shine due to corrosion or wear, while a dull surface simply lacks a lustrous finish. Grubby, dirty, and rough surfaces are characterized by the presence of dirt, grime, or rough textures. Unfinished surfaces are those that have not yet been polished or are still in a raw state.