nastiness

/ˈnæstinəs/
noun
  1. The quality of being unkind, unpleasant, or spiteful.
    • She couldn't believe the nastiness in her coworker's voice during the meeting.
    • The movie showed the nastiness of the villain, who enjoyed causing pain.
    • The nastiness of the comments on social media surprised everyone.
  2. The state of being very unpleasant or severe (e.g., of weather, a situation, or an injury).
    • He was shocked by the nastiness of the cut on his leg.
    • The nastiness of the winter storm forced schools to close for two days.
    • The nastiness of the argument left both friends feeling hurt.