Synonym: conundrum, enigma, puzzle. Similar words: middle, fiddle, middle-class, middle class, in the middle of, middle ground, ridden, addle. Meaning: ['rɪdl] 
n. 1. a difficult problem 2. a coarse sieve (as for gravel). v. 1. pierce with many holes 2. set a difficult problem or riddle 3. separate with a riddle, as grain from chaff 4. spread or diffuse through 5. speak in riddles 6. explain a riddle.
n. 1. a difficult problem 2. a coarse sieve (as for gravel). v. 1. pierce with many holes 2. set a difficult problem or riddle 3. separate with a riddle, as grain from chaff 4. spread or diffuse through 5. speak in riddles 6. explain a riddle. 
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1 See if you can solve this riddle .
2 Scientists may have solved the riddle of Saturn's rings.
3 He found out the riddle at last.
4 His daily work is to riddle coal cinders to get out the larger pieces.
5 Scientists claimed yesterday to have solved the riddle of the birth of the Universe.
6 She's a complete riddle, even to her parents.
7 I'll riddle you with bullets!
8 The riddle couldn't be solved by the child.
9 Her disappearance is a complete riddle.
10 The riddle was at last unriddled.
11 Russia is a riddle wrapped in a mystery inside an enigma.
12 The police have been unable to solve the riddle of her disappearance.
13 He got the answer to the riddle as quick as a flash.
14 Solve the riddle of this verse, Or suffer Ariaca's curse!
15 As investigators probed the brain further,(www.Sentencedict.com) the riddle of the mind revealed itself to be deeply specific.
16 Unsettled by the riddle, Mungo finally decided that Jos had probably shut him up just to get some peace.
17 How do we solve the riddle of the disappearing marriage?
18 If that had happened to Riddle, when Franks performed the autopsy he would find it.
19 It was possible that Riddle had committed suicide in such a way as to make it appear that he had been murdered.
20 Must know his job else Riddle wouldn't have kept him, nephew or no nephew.
21 I'm just a little bit caught in the middle. Life is a maze and love is a riddle, I don't know where to go, can't do it alone.
22 Countless people have had a stab at solving the riddle.
23 But how many have ever stopped to consider this particular riddle?
24 That meant within an hour or so of the time at which Mary Penrose claimed that Riddle had left her.
25 Long chains of tiny craters on Phobos suggest the drainage of regolith into deep cracks that riddle its interior.
26 I looked into the mirror, searching once again into the riddle of my face.
27 The package includes a pack of cards and a booklet which has a riddle running through its pages.
28 While conducting interviews for this book, I sometimes posed the chameleon riddle to my interviewees.
29 On his wanderings Oedipus came to Thebes, solved the riddle of the Sphinx, and thus delivered the city.
30 According to Greek legend, it was Oedipus who solved the riddle of the Sphinx.
More similar words: middle, fiddle, middle-class, middle class, in the middle of, middle ground, ridden, addle, meddle, cuddle, coddle, saddle, peddle, huddle, paddle, puddle, huddled, meddler, befuddle, befuddled, huddle together, meddlesome, hidden, midday, cuddly, rid, arid, ride, lurid, rider.