appal

/AE0 P AH0 L/
verb
  1. 1

    To fill with horror; to dismay.

    โ€œThe evidence put forth at the court appalled most of the jury.โ€

  2. 2

    To make pale; to blanch.

  3. 3

    To weaken; to reduce in strength

  4. 4

    To grow faint; to become weak; to become dismayed or discouraged.

  5. 5

    To lose flavour or become stale.

Source: https://en.wiktionary.org/wiki/appal, https://en.wiktionary.org/wiki/appall