Epruinose is an adjective that refers to something that is covered in a powdery or waxy substance. Antonyms for this word would therefore be terms that describe something that is smooth, shining, or lacking in any kind of powdery residue. Examples might include words like lustrous, glossy, polished, sleek, or shiny. Other possible antonyms might include terms that describe something that is rough, scratchy, or textured in some way, such as rough-hewn, abrasive, or coarse. In general, antonyms for epruinose would be words that describe a surface that is free from any kind of powdery marking or coating, and that is instead characterized by its smoothness, shine, or texture.