anxiety
US /æŋˈzaɪ.ə.t̬i/
UK /æŋˈzaɪ.ə.t̬i/

1.
a feeling of worry, nervousness, or unease, typically about an event or something with an uncertain outcome.
:
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He felt a surge of anxiety as he waited for the test results.
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Her constant anxiety about her job affected her sleep.
2.
a nervous disorder characterized by a state of excessive uneasiness and apprehension, typically with compulsive behavior or panic attacks.
:
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She was diagnosed with generalized anxiety disorder.
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Therapy can be very effective in managing chronic anxiety.