Ma must not roughen her hands or the silks she worked with would be spoiled.

Do not use a knife in removing the paper, as it is liable to roughen the wood.

"And love has wings," he said, twisting his face comically to roughen the words.

Do not use a knife in removing the paper, as it is likely to roughen the wood.

If we roughen a corn stalk with sand-paper we may sharpen a knife upon it.

This slide was in perfect condition, and the otters were careful not to roughen it.

It is then rubbed with fine sandstone to roughen the surface.

A grisly mustache was just beginning to roughen the stranger's upper lip.

Plane it straight and roughen its two-inch surface with a file.

The rubber used should not be of a harsh grade, since that will roughen the face of the paper and probably cause the ink to run.