acridness

n. quality of being bitter, quality of being irritating; quality of being caustic, acerbity

Noun
1. extreme bitterness; "the acridity of alkali"
(synonym) acridity
(hypernym) bitterness, bitter
2. the quality of being sharply disagreeable in language or tone
(synonym) acridity
(hypernym) disagreeableness

(n.)
The quality of being acrid or pungent; irritant bitterness; acrimony; as, the acridity of a plant, of a speech.
  

ASPREZZA. ACREDINE