#1 riddle v. pierce with many holes; "The bullets riddled his body". wn
#2 riddle n. [conundrum, enigma, brain-teaser] a difficult problem. wn
#3 riddle v. set a difficult problem or riddle; "riddle me a riddle". wn
#4 riddle n. a coarse sieve (as for gravel). wn
#5 riddle v. [screen] separate with a riddle, as grain from chaff. wn
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