DISMAY, APPALL, HORRIFY, DAUNT mean to unnerve or deter by arousing fear, apprehension, or aversion.

DISMAY implies that one is disconcerted and at a loss as to how to deal with something.

e.g. dismayed at the size of the job

APPALL implies that one is faced with that which perturbs, confounds, or shocks.

e.g. I am appalled by your behavior

HORRIFY stresses a reaction of horror or revulsion.

e.g. was horrified by such wanton cruelty

DAUNT suggests a cowing, disheartening, or frightening in a venture requiring courage.

e.g. a cliff that would daunt the most intrepid climber

consternation and distress, typically that caused by something unexpected:

｟かたく｠ うろたえ(ること), ろうばい; おびえ; 失望

e.g. to his dismay, she left him.

verb with object

cause (someone) to feel consternation and distress:

｟かたく｠ 〈人など〉をうろたえさせる, 失望させる(→ 分詞dismayed)

e.g. they were dismayed by the U-turn in policy.

Middle English: from Old French, based on Latin dis- (expressing negation) + the Germanic base of may1.