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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 rough·en /ˈrʌfən/
 (vt.)(vi.)(使)變粗糙

From: Webster's Revised Unabridged Dictionary (1913)

 Rough·en v. t. [imp. & p. p. Roughened p. pr. & vb. n. Roughening.]  To make rough.

From: Webster's Revised Unabridged Dictionary (1913)

 Rough·en, v. i. To grow or become rough.
 

From: WordNet (r) 2.0

 roughen
      v : make rough or rougher; "rough the surfaces so they will
          stick to each other" [ant: smooth]