mystery; latency &c 526; Asian mystery†; sealed book, secrets of the
prison house; le desous des cartes [Fr.].
enigma, riddle, puzzle, nut to crack, conundrum, charade, rebus,
logogriph†; monogram, anagram; Sphinx; crux criticorum [Lat.].
maze, labyrinth, Hyrcynian wood; intricacy, meander.
problem &c (question) 461; paradox &c (difficulty) 704;
unintelligibility &c 519; terra incognita &c (ignorance) 491.
Adj. secret &c (concealed) 528; involved &c, 248; labyrinthine,
labyrinthian†, mazy.
confidential; top secret.