conundrum
Cross references: 1. mystery co.nun.drum \k*-'n*n-dr*m\ n [origin unknown] 1: a riddle whose answer is or involves a pun 2a: a question or problem having only a conjectural answer 2b: an intricate and difficult problem
Cross references: 1. mystery co.nun.drum \k*-'n*n-dr*m\ n [origin unknown] 1: a riddle whose answer is or involves a pun 2a: a question or problem having only a conjectural answer 2b: an intricate and difficult problem