acerbity

noun3

1. •
   Sourness of taste, with bitterness and astringency, like that of unripe fruit.
2. •
   Something harsh (e.g. a remark, act or experience).

   • […] the recollection of that yesterday […] made him bear with the meekness and patience of a true-hearted man all the worrying little acerbities of to-day — 1848
3. •
   (figurative) Harshness, bitterness, or severity.