drastically

adverb
  1. 1

    To a drastic degree.

    โ€œThis recession has been drastically different.โ€

  2. 2

    In a drastic manner.

    โ€œLisa always wore shorts and a T-shirt, which clashed drastically with her brother's thick winter coat.โ€

Source: https://en.wiktionary.org/wiki/drastically