noun

enigma

mystery, puzzle, riddle

His disappearance remains an enigma.

His disappearance remains an enigma.

She is a complete enigma to me.

She is a complete enigma to me.

((sb./sth.)) is an enigma ((to sb.)) (sb./sth.) is a mystery (to sb.) She is a complete enigma to me.

Synonyms: mystery, puzzle, riddle, conundrum

From Greek 'ainigma' meaning 'riddle'.

Think of the Enigma machine from WWII, a complex and mysterious code-making device.

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