Unspeckled means without any spots or markings. As such, its antonyms would include speckled, spotted, marked, freckled, and stippled among others. These terms convey the opposite of unspeckled, with speckled and spotted indicating an object or surface that has multiple spots or markings, while freckled suggests the presence of small brownish marks. Stippled refers to a surface characterized by numerous small, regular dots, while marked can refer to any surface with visible marks or blemishes. The choice of the antonym depends on the context in which the word unspeckled is used.