unsmooth adjective 1verb 1forms 3 adjective1 •Not smooth; rough.G. Fletcher How may weak mortal ever hope to file His unsmooth tongue, and his deprostrate style? verb1 •To make no longer smooth; to roughen or furrow.Her face gathers, furrows, glooms; arching eyebrows wrinkle into horizontals, and a tinge of bitterness unsmooths the cheek and robs the lip of sweetened grace. She is evidently perturbed. — 1882 formsunsmoothed · unsmoothing · unsmooths