#roughness

• Roughness — The state, quality, or characteristic of a surface being uneven, porous, or rough to the touch; (in a structural or technical sense) a small prominence, unevenness, or geometric imperfection that increases the friction force between two contacting bodies; (figuratively) a manifestation of hardness, harshness, or severity in behavior, language, or interpersonal relations.
• Roughness — A sensation or property of a surface, material, or food of being rough, rugged, coarse, or lacking smoothness; a tactile characteristic of an object that scratches or opposes resistance to touch; in a gustatory sense, it describes an astringent, sour-bitter, or harsh sensation on the tongue (specific to young wines or unripe fruits); in a figurative sense, it refers to a harshness of character, severity, or hardness in behavior or expression.
• Harshness — The quality or state of being rough or harsh; a lack of smoothness, fineness, or softness of a tactile surface; an astringent or unpleasant sensation to the taste; in a figurative sense, it represents an extreme severity of character, rigidity in applying rules, hardness of language, intolerance, or a violent intensity of meteorological phenomena.