roughened

The word 'roughened' is built upon the Old English adjective rūh, which described a coarse, hairy, or uneven texture. The Germanic suffix '-en' was attached to create the verb 'roughen', a causative/ingressive verb meaning "to make or become rough." Finally, the past participle suffix '-ed' completes the form, creating an adjective that describes a state resulting from that action. This etymological construction follows a clear and productive pattern in English, where an adjective is verbalized and then adjectivalized again to denote a quality that has been acquired or imposed.

Structure: rough (not smooth) + en (verb suffix) + ed (adjective/participle suffix) - rough: From Old English rūh, meaning "shaggy, hairy, coarse." It functions as the core adjective/root. - en: A verb-forming suffix of Germanic origin, used to form verbs meaning "to become or cause to be" the quality of the root. - ed: A suffix of Old English origin, here forming a past participle which can function as an adjective.