Imposture refers to someone falsely claiming to be another, often for personal gain. His imposture as a doctor ended when the hospital staff became suspicious.
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Illegality Associated
Using imposture to deceive is usually illegal and can lead to arrest or penalties. She faced jail time for her imposture that cost investors millions.
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Negative Connotation
Imposture generally has a negative tone, as it involves deception and dishonesty. The community was outraged by the charity worker's imposture.