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Synonyms and Antonyms of enigma

  1. something hard to understand or explain <how Thomas Jefferson could be both a slaveholder and a champion of liberty remains an enigma> Synonyms closed book, conundrum, mystery, head-scratcher, mystification, puzzle, puzzlement, riddle, secretRelated Words brainteaser, case, challenge, knot, matter, perplexity, poser, problem, stumper, trouble

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