acridness acridness /ˈækˌrɪdnəs/

noun

1. The quality of being sharply disagreeable in language or tone  ( acridity , acridness )
   the quality of being sharply disagreeable in language or tone
   
2. Extreme bitterness  ( acridity , acridness )
   extreme bitterness
    The acridity of alkali
   the acridity of alkali