coarsest

of textures that are rough to the touch or substances consisting of relatively large particles; "coarse meal"; "coarse sand"; "a coarse weave"

lacking refinement or cultivation or taste; "he had coarse manners but a first-rate mind"; "behavior that branded him as common"; "an untutored and uncouth human being"; "an uncouth soldier--a real tough guy"; "appealing to the vulgar taste for violence"; "the vulgar display of the newly rich"

of low or inferior quality or value; "of what coarse metal ye are molded"- Shakespeare; "produced...the common cloths used by the poorer population"