Similar words: rough and ready, rough, trough, through, drought, roughen, borough, brought. Meaning: ['rʌfɪdʒ] 
n. coarse food high in fiber but low in nutrients; its bulk stimulates peristalsis.
n. coarse food high in fiber but low in nutrients; its bulk stimulates peristalsis. 
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31. Improving the growth of rumen microorganisms by supplementing some nutrients into ruminant's ration is an essential way to improve the nutritive value of roughage.
More similar words: rough and ready, rough, trough, through, drought, roughen, borough, brought, wrought, roughly, thorough, go through, rough-hewn, see through, all through, throughout, roughness, get through, through to, thoroughly, run through, fall through, run-through, come through, cut through, put through, pull through, look through, pass through, overwrought.