nastily

/ˈnæstəli/
adverb
  1. In an unkind, unpleasant, or spiteful manner.
    • He nastily refused to help his brother with the homework.
    • She spoke nastily to the waiter, which embarrassed everyone at the table.
    • The two politicians argued nastily during the debate, insulting each other.
  2. In a way that is very unpleasant or severe (often used for weather, injuries, or situations).
    • The wind blew nastily, making it hard to walk outside.
    • The storm turned nastily, with hail and lightning striking nearby.
    • He fell and twisted his ankle nastily, so he had to go to the hospital.