rid·dle 2 
(rĭdl)
(rĭdl)n.
1. A question or statement requiring thought to answer or understand; a conundrum.
2. One that is perplexing; an enigma.
v. rid·dled, rid·dling, rid·dles
v.tr.
To solve or explain.
v.intr.
1. To propound or solve riddles.
2. To speak in riddles.
[Middle English redels, from Old English rǣdels; see ar- in the Appendix of Indo-European roots.]
riddler n.