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 ...