Noah Webster
Anxiety
ANXI'ETY, noun angzi'ety. [Latin anxietas, from anxius, solicitous; Latin ango. See Anger.]
1. concern or solicitude respecting some event, future or uncertain, which disturbs the mind, and keeps it in a state of painful uneasiness. it expresses more than uneasiness or disturbance, and even more than trouble or solicitude. it usually springs from fear or serious apprehension of evil, and involves a suspense respecting an event, and often, a perplexity of mind, to know how to shape our conduct.
2. In medical language, uneasiness; unceasing restlessness in sickness.