IPA: /ˈrʌfər/
KK: /rʌfər/
Having an uneven or irregular surface; not smooth or level.
The rougher texture of the fabric makes it more durable.
Rougher → It is formed from "rough" (from Old English *ruh*, meaning uneven or coarse) and "-er" (meaning one who or that which). The word "rougher" refers to something that is more uneven or coarse than something else.
Think of something that is 'more uneven' or 'coarse' — 'rough' describes the texture, and '-er' indicates a comparison.