The Collaborative International Dictionary of English v.0.48:

Roughhew \Rough"hew`\, v. t.
   1. To hew coarsely, without smoothing; as, to roughhew
      timber.
      [1913 Webster]

   2. To give the first form or shape to; to form rudely; to
      shape approximately and rudely; to roughcast.
      [1913 Webster]

            There's a divinity that shapes our ends,
            Roughhew them how we will.            --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rough-hew
    v 1: hew roughly, without finishing the surface; "rough-hew
         stone or timber" [syn: rough-hew, roughcast]