n.
1.a difficult problem
2.a coarse sieve (as for gravel) riddle v.
1.pierce many times
2.set a difficult problem or riddle
3.separate with a riddle, as grain from chaff
4.speak in riddles
5.explain a riddle
Idiom of the Day
run out of patience
to become annoyed after being patient for a period of time
The mother has run out of patience with her son.