D defs.my
Entry 5 senses Webster, 1913

Asperity

/əs-pĕr'-ĭt-ē/ · As·per·i·ty · IPA /əˈspɛɹɪti/
01 n. Roughness of surface; unevenness; -- opposed to smoothness.
pl. Asperities
  1. 1.
    Roughness of surface; unevenness; -- opposed to smoothness.
  2. 2.
    Roughness or harshness of sound; that quality which grates upon the ear; raucity.
  3. 3.
    Roughness to the taste; sourness; tartness.
  4. 4.
    Moral roughness; roughness of manner; severity; crabbedness; harshness; -- opposed to mildness.
    “It is no very cynical asperity not to confess obligations where no benefit has been received.” Johnson.
  5. 5.
    Sharpness; disagreeableness; difficulty.
    “The acclivities and asperities of duty.” Barrow.