| 例句 |
enigmasnounpl. of enigma something hard to understand or explainhow Thomas Jefferson could be both a slaveholder and a champion of liberty remains an enigma closed books, conundrums, head-scratchers, mysteries, mystifications, puzzlements, puzzles, riddles, secrets, whys brainteasers, cases, challenges, knots, matters, perplexities, posers, problems, stumpers, troubles |