e·nig·ma n.; pl. enigmas
1. A dark, obscure, or inexplicable saying; a riddle; a statement, the hidden meaning of which is to be discovered or guessed.
A custom was among the ancients of proposing an enigma at festivals. --Pope.
2. An action, mode of action, or thing, which cannot be satisfactorily explained; a puzzle; as, his conduct is an enigma.
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