noun
a feeling of anxiety or dismay, typically at something unexpected
adjective
consternation can also be used as an adjective to describe a feeling of anxiety or dismay
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The news of the company's bankruptcy caused great consternation among the employees.
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There was a lot of consternation among the students when they found out about the surprise test.
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The team's loss in the championship game left fans in a state of total consternation.
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Her sudden resignation threw the office into a state of consternation as they scrambled to find a replacement.