1. (n.) Harshness of manner; ill temper; irritability\.

2. (n.) Roughness or harshness of sound; that quality which grates upon the ear; raucity.

3. (n.) Roughness to the taste; sourness; tartness.

4. (n.) Moral roughness; roughness of manner; severity; crabbedness; harshness; -- opposed to mildness.

5. (n.) Sharpness; disagreeableness; difficulty.

acerbity acid acidity acidness acidulousness acridity acrimony anger animosity astringency austerity bad humor bad temper bile biliousness bitingness bitter resentment bitterness bitterness of spirit bumpiness causticity causticness choler choppiness corrosiveness cragginess cuttingness discontent edge gall gnashing of teeth granulation grimness hard feelings hardness hardship harshness heartburning hispidity ill humor ill nature ill temper incisiveness inclemency inequality irregularity irritability jaggedness joltiness keenness mordacity mordancy nonuniformity piercingness piquancy poignancy pungency raggedness rancor rankling rigor rough air roughness ruggedness rugosity scraggliness severity sharpness slow burn snappishness soreness sourness spleen stabbingness stringency tartness tooth trenchancy turbulence unevenness unsmoothness ununiformity vicissitude virulence waspishness