/'rɪdl; `rɪdl/
n [C]
1 puzzling question, statement or description, esp one intended to test the cleverness of those wishing to solve it 谜; （尤指）谜语
*ask/tell sb a riddle 出个谜语叫某人猜
* know the answer to/solve a riddle 知道谜底
* She speaks/talks in riddles it's very difficult to know what she means. 她说话含糊其辞--实在令人费解.
2 puzzling person, thing, event, etc 谜一般的人、东西、事情等
*She's a complete riddle, even to her parents. 她是个很难了解的人, 连她父母都无法了解她.
* the riddle of how the universe originated 宇宙起源之谜.

/'rɪdl; `rɪdl/
n [C] coarse sieve for earth, gravel, cinders, etc （筛泥土、碎石、煤渣等用的）粗筛.

v
1 [Tn]
(a) pass (gravel, etc) through a riddle 用粗筛筛（碎石等）.
(b) shake (a grate, eg in a stove) in order to make ashes, cinders, etc fall through 摇动（炉箅子等）使灰、煤渣等落下.
2 (a) [esp passive 尤用于被动语态
*Tn, Tn.pr] ~ sb/sth (with sth) make many holes in sb/sth 将某人[某物]弄得满是窟窿
*The car was riddled from end to end. 那汽车前前後後都是窟窿.
* The roof was riddled with bullet holes. 房顶满是子弹打的窟窿.
(b) [Tn.pr esp passive 尤用于被动语态] ~ sb/sth with sth affect sb/sth completely 严重影响或侵袭某人[某事物]
*(derog 贬) They are riddled with disease. 他们饱受病痛之苦.
* an administration riddled with corruption 极其腐败的政府.