Burnished refers to something that has been polished to a shine. Its antonyms will therefore refer to things that are dull or not shiny. Some antonyms for the word "more burnished" include tarnished, dull, aged, rusty, and patinated. Tarnished refers to something that is discoloured or stained, such as silverware that has lost its shine. Dull also refers to something that is not shiny, but also lackluster or boring. Aged or weathered materials can also lose their shine over time. Rusty materials have a layer of rust that prevents them from shining. Finally, patinated refers to something that has acquired a sheen due to natural wear and tear or oxidation.