名詞 dismay:

1. the feeling of despair in the face of obstacles
   同義詞：discouragement, disheartenment
2. fear resulting from the awareness of danger
   同義詞：alarm, consternation

動詞 dismay:

1. lower someone's spirits; make downhearted
   同義詞：depress, deject, cast down, get down, dispirit, demoralize, demoralise
2. fill with apprehension or alarm; cause to be unpleasantly surprised
   同義詞：alarm, appal, appall, horrify

1. Her face registered dismay.
   她臉上流露出驚慌的神色
2. This appointment was greeted with relief, dismay, etc.
   這一委任使人欣慰、 悵惘等。
3. It dismayed us that the project had been canceled.
   那個計劃取消了，這讓我們非常驚訝。
4. To my dismay, he made the same mistakes.
   讓我感到沮喪的是，他又犯了同樣的錯誤。

dis.may

v.tr.（及物動詞）
dis.mayed,dis.may.ing,dis.mays
To destroy the courage or resolution of by exciting dread or apprehension.
使驚恐；使喪氣：因有刺激的恐懼或擔(dān)憂而失去勇氣或果斷
To cause to lose enthusiasm; disillusion:
使失去熱情；使幻想破滅：
例句：
was dismayed to learn that her favorite dancer used drugs.
獲悉她喜愛的舞蹈演員吸毒，她感到很失望

To upset or alarm.
使不安，使驚慌
n.（名詞）
A sudden or complete loss of courage in the face of trouble or danger.
喪膽，絕望：在面臨麻煩或危險時，突然或完全失去勇氣

來源：
Middle English dismaien
中古英語 dismaien
from Anglo-Norman *desmaiier
源自 英法語 *desmaiier
probably de- [intensive pref.] * see de-
可能為 de- [強(qiáng)調(diào)前綴] *參見 de-
Old French esmaier [to frighten] from Vulgar Latin *exmag3re [to deprive of power] Latin ex- [ex-] Germanic *magan [to be able to] * see magh-
古法語 esmaier [使害怕，使驚恐] 源自 俗拉丁語 *exmag3re [使無力] 拉丁語 ex- [表示.去除.的意思] 日耳曼語 *magan [能] *參見 magh-

【引伸】
dismay.ingly
adv.（副詞）
<參考詞匯><同義詞>dismay,appall,daunt,horrify,shakeThese verbs mean to deprive a person of courage or the power to act as a result of fear or anxiety.
這些動詞都指由于害怕或緊張而無勇氣或無力去做某事。
Dismay is the least specific:
Dismay 是最普通的：
例句：
The news of plummeting stock prices dismayed speculators.
股票價格驟然下跌的消息使股民大為失望。

Appall implies a sense of helplessness caused by an awareness of the enormity of something:
Appall 含有一種由于某事物的暴虐而造成的無助感：
例句：
.for as this appalling ocean surrounds the verdant land. (Herman Melville).
.因為當(dāng)可怕的海水將這塊郁郁蔥蔥的陸地圍住時. （赫爾曼·麥爾維爾）。

Daunt suggests an abatement of courage:
Daunt 暗指勇氣的減少：
例句：
.captains courageous, whom death could not daunt. (Anonymous ballad).
.勇敢的船長，死亡不會使他們膽怯. （作者不詳?shù)拿裰{）。

Horrify implies dread, shock, or revulsion:
Horrify 暗含了害怕、震驚或突變之意：
例句：
horrified by the possibility of nuclear war. To
因有可能爆發(fā)核戰(zhàn)爭而害怕

shake is to dismay profoundly:
shake 指深深地感到失望：
例句：
.A little swift brutality shook him to the very soul. (John Galsworthy).See also Synonyms at fear
.短而快速的暴力行為使他驚恐不已. （約翰·高爾斯華綏）參見同義詞 fear