n.
Pronunciation: ' ri-d ə l
Function: noun
Etymology: Middle English redels, ridel, from Old English r ǣ delse opinion, conjecture, riddle; akin to Old English r ǣ dan to interpret ― more at READ
Date: before 12th century
1 : a mystifying, misleading, or puzzling question posed as a problem to be solved or guessed : CONUNDRUM , ENIGMA
2 : something or someone difficult to understand
synonyms see MYSTERY