dismay

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To cause to lose enthusiasm or resolution; disillusion or discourage: synonym: discourage.
• transitive verb To upset or distress.
• noun A sudden or complete loss of courage in the face of trouble or danger.

from The Century Dictionary.

• To break down the courage of, as by sudden danger or insuperable difficulty; overcome with fear of impending calamity or failure; fill with despairing apprehension; utterly dishearten: usually in the past participle.
• To defeat by sudden onslaught; put to rout.
• To disquiet; trouble: usually reflexive.
• Synonyms To appal, daunt, dispirit, deject, frighten, paralyse, demoralize.
• To be daunted; stand aghast with fear; be confounded with terror.
• noun Sudden or complete loss of courage; despairing fear or apprehension; discouraged or terrified amazement; utter disheartenment.
• noun Ruin; defeat; destruction.
• noun Synonyms Apprehension, Fright, etc. (see alarm); discouragement.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb obsolete To take dismay or fright; to be filled with dismay.
• transitive verb To disable with alarm or apprehensions; to depress the spirits or courage of; to deprive or firmness and energy through fear; to daunt; to appall; to terrify.
• transitive verb obsolete To render lifeless; to subdue; to disquiet.
• noun Loss of courage and firmness through fear; overwhelming and disabling terror; a sinking of the spirits; consternation.
• noun Condition fitted to dismay; ruin.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A sudden or complete loss of courage and firmness in the face of trouble or danger; overwhelming and disabling terror; a sinking of the spirits; consternation.
• noun Condition fitted to dismay; ruin.
• verb To disable with alarm or apprehensions; to depress the spirits or courage of; to deprive of firmness and energy through fear; to daunt; to appall; to terrify.
• verb To render lifeless; to subdue; to disquiet.
• verb To take dismay or fright; to be filled with dismay.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb fill with apprehension or alarm; cause to be unpleasantly surprised
• verb lower someone's spirits; make downhearted
• noun the feeling of despair in the face of obstacles
• noun fear resulting from the awareness of danger