roughness

1. The property of being rough, coarseness. (countable, uncountable) · The roughness of the road made me wonder if my car would fall apart.
2. Something that is rough; a rough spot. (countable, uncountable)
3. Roughage; coarse fodder. (US, countable, uncountable)
4. A measure of how rough something is, such as a surface (countable) · The surface roughness was low.

الجمع roughnesses