Asperity

1. n. Sharpness; disagreeableness; difficulty.
2. n. Roughness of surface; unevenness; — opposed to smoothness.
3. n. Roughness or harshness of sound; that quality which grates upon the ear; raucity.
4. n. Roughness to the taste; sourness; tartness.
5. n. Moral roughness; roughness of manner; severity; crabbedness; harshness; — opposed to mildness.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.