asperities
 粗糙
 As·per·i·ty n.; pl. Asperities
 1. Roughness of surface; unevenness; -- opposed to smoothness. “The asperities of dry bodies.”
 2. Roughness or harshness of sound; that quality which grates upon the ear; raucity.
 3. Roughness to the taste; sourness; tartness.
 4. Moral roughness; roughness of manner; severity; crabbedness; harshness; -- opposed to mildness. “Asperity of character.”
    It is no very cynical asperity not to confess obligations where no benefit has been received.   --Johnson.
 5. Sharpness; disagreeableness; difficulty.
    The acclivities and asperities of duty.   --Barrow.
 Syn: -- Acrimony; moroseness; crabbedness; harshness; sourness; tartness. See Acrimony.
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