- Bitterness - Sourness or tartness - The level of acid in a substance - The quality of being sour; sourness; tartness; sharpness
to the taste; as, the acidity of lemon juice.
- The sour juice of crab apples, of green or unripe grapes,
apples, etc.; also, an acid liquor made from such juice. - Tartness; sourness, as of disposition.
- Rigour - Sharpness and intensity of tone - sharpness of tone - Roughness of surface; unevenness; -- opposed to
smoothness. - Roughness or harshness of sound; that quality which
grates upon the ear; raucity. - Roughness to the taste; sourness; tartness. - Moral roughness; roughness of manner; severity;
crabbedness; harshness; -- opposed to mildness.