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/ˈdäpəlˌɡaNGər/
noun
noun: doppelgänger; plural noun: doppelgängers
an apparition or double of a living person.
"he has a doppelgänger named Donald, his invented twin brother"
Origin
mid 19th century: from German, literally ‘double-goer.’
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Use over time for: doppelganger
Translations, word origin, and more definitions
At my gym, there's two people who are doppelgangers for two famous combat sports athletes.