noun
Enigma
noun
1
A person or thing that is puzzling, mysterious, or hard to understand.
"His sudden disappearance remains an enigma to this day."
"She was something of an enigma to her colleagues, friendly but never revealing much about herself."
How to Use Enigma
Learner’s notesIn plain EnglishSomething or someone genuinely puzzling or mysterious.
Common pairings
remains an enigma
something of an enigma
wrapped in an enigma
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His sudden disappearance remains an _____ to this day.