Meanings
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1
noun
a persistent source of irritation or annoyance
Traffic jams are a common bugbear for commuters.
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2
noun
an object of dread or fear, often without real cause
The idea of public speaking is a bugbear for many people.
Thesaurus
Etymology
From Middle English bug-/bugge ('hobgoblin; scarecrow') + bear; originally an imaginary creature used to frighten children, later a persistent source of annoyance or fear.