anonymous
US /əˈnɑː.nə.məs/
UK /əˈnɑː.nə.məs/
1.
not identified by name; of unknown name
:
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The donation was made by an anonymous donor.
•
She received an anonymous letter.
2.
having no outstanding or recognizable features; unremarkable or impersonal
:
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He lived an anonymous life in a big city.
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The hotel room was rather anonymous, lacking any personal touches.