riddle; enigma; unpredictable situation; elusive matters

puzzle; riddle

riddle; conundrum; CL:條|条[tiao2]

answer to a riddle

(neologism) (slang) (attributive) mysterious; enigmatic (calque from Japanese 謎の "nazo no")

letter puzzle

to answer a riddle; to guess (i.e. form an opinion without much evidence)

puzzle; mystery

riddles written on lanterns (e.g. for the Lantern Festival at the end of Chinese New Year)

to solve the riddle