appal

verb5

1. •
   To fill with horror or indignation; to dismay.

   • The evidence put forth at the court appalled most of the jury.
2. •
   (no longer used) To make pale; to blanch.

   • Thanswere that ye made to me my dere whañ I did sewe for my poore hartes redresse hathe so apalld my countenaunce […] — 1527
3. •
   (no longer used) To weaken; to reduce in strength

   • wine of it owne nature will not congeale and freeze, onely it will loose the strength, and become appalled in extremitie of cold. — 1601
4. •
   (no longer used) To grow faint; to become weak; to become dismayed or discouraged.
5. •
   (no longer used) To lose flavor or to become stale.