appall
verb
°To depress or discourage with fear; to impress with fear in such a manner that the mind shrinks, or loses its firmness; to overcome with sudden terror or horror; to dismay; as, the sight appalled the stoutest heart.
"The house of peers was somewhat appalled at this alarum. --."
synonyms: dismay, terrify, daunt, frighten more» , affright, scare, depress