1911 Encyclopædia Britannica/Conundrum

CONUNDRUM (a word of unknown origin, probably coined in burlesque imitation of scholastic Latin, as “hocus-pocus” or “panjandrum”), originally a term meaning whim, fancy or ridiculous idea; later applied to a pun or play upon words, and thus, in its usual sense, to a particular form of riddle in which the answer depends on a pun. In a transferred sense the word is also used of any puzzling question or difficulty.