verb (used with object), un·rid·dled, un·rid·dling.
Examples from the Web for unriddle
So the "muckle stane" was replaced for the next comer who had strength and curiosity enough to unriddle the sphinx.
If he had suddenly begun to unriddle the problem of "the thing in itself," I should scarcely have been astonished.Simon Eichelkatz; The Patriarch|Ulrich Frank
The disappearance of the child was a mystery which no one could unriddle.
But bethink you of them, and you will unriddle them for yourself, perhaps.Bardelys the Magnificent|Rafael Sabatini
I come to thy den, old man, that I may unriddle thy dark sayings.