anxiety

Từ điển American Heritage Dictionary 4th

anx·i·e·ty (ăng-zīʹĭ-tē)n. pl. anx·i·e·ties
1.
a. A state of uneasiness and apprehension, as about future uncertainties.
b. A cause of anxiety:
For some people, air travel is a real anxiety.
2. Psychiatry. A state of apprehension, uncertainty, and fear resulting from the anticipation of a realistic or fantasized threatening event or situation, often impairing physical and psychological functioning.
3. Eager, often agitated desire:
my anxiety to make a good impression. [Latin ānxietās, from ānxius, anxious. See anxious.] 
Synonyms: anxiety, worry, care, concern, solicitude
These nouns refer to troubled states of mind. Anxiety suggests feelings of fear and apprehension: “Feelings of resentment and rage over this devious form of manipulation cannot surface in the child.... At the most, he will experience feelings of anxiety, shame, insecurity, and helplessness” (Alice Miller). Worry implies persistent doubt or fear: “Having come to a decision the lad felt a sense of relief from the worry that had haunted him for many sleepless nights” (Edgar Rice Burroughs). Care denotes a state of mind burdened by heavy responsibilities: The old man's face was worn with care. Concern stresses serious thought combined with emotion: “Concern for man himself and his fate must always form the chief interest of all technical endeavors” (Albert Einstein). Solicitude is active and sometimes excessive concern for another's well-being: “Animosity had given way... to worried solicitude for Lindbergh's safety” (Warren Trabant).