scariest

adjective
  1. 1

    Causing or able to cause fright.

    โ€œShe was hiding behind her pillow during the scary parts of the film.โ€

  2. 2

    Uncannily striking or surprising.

    โ€œLinda changed her hair, and itโ€™s scary how much she looks like her mother.โ€

  3. 3

    Subject to sudden alarm; easily frightened.

Source: https://en.wiktionary.org/wiki/scariest, https://en.wiktionary.org/wiki/scary