Meanings
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1
verb
to make someone agitated, nervous, or confused
The unexpected question did not fluster the experienced witness.
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2
noun
a state of nervous agitation or confusion
In her fluster, she left the tickets on the kitchen table.
Thesaurus
Etymology
Probably from a lost Middle English verb reflected in flostring ("agitation, blustering") and related to Scandinavian forms such as Icelandic flaustra ("to bustle"). The noun developed from the verb.