Nouns

(n)riddle, conundrum, enigma, brain-teasera difficult problem
(n)riddlea coarse sieve (as for gravel)

Verbs

(v)riddlepierce with many holes“The bullets riddled his body”
(v)riddleset a difficult problem or riddle“riddle me a riddle”
(v)riddle, screenseparate with a riddle, as grain from chaff
(v)permeate, pervade, penetrate, interpenetrate, diffuse, imbue, riddlespread or diffuse through“An atmosphere of distrust has permeated this administration”, “music penetrated the entire building”, “His campaign was riddled with accusations and personal attacks”
(v)riddlespeak in riddles
(v)riddleexplain a riddle