appall

Etymology

From Middle English apallen, from Old French apalir (“to grow pale, make pale”); a (Latin ad) + palir (“to grow pale, to make pale”), pâle (“pale”). See pale (adj.) and compare with pall.

verb

1. (transitive) To fill with horror and/or indignation; to dismay.
   The evidence put forth at the court appalled most of the jury.
2. (transitive, obsolete) To make pale; to blanch.
3. (transitive, obsolete) To weaken; to reduce in strength
4. (intransitive, obsolete) To grow faint; to become weak; to become dismayed or discouraged.
5. (intransitive, obsolete) To lose flavour or become stale.