puzzle, mystery, riddle, problem

名詞 riddle:

1. a difficult problem
   同義詞：conundrum, enigma, brain-teaser
2. a coarse sieve (as for gravel)

動詞 riddle:

1. pierce with many holes
2. set a difficult problem or riddle
3. separate with a riddle, as grain from chaff
   同義詞：screen
4. spread or diffuse through
   同義詞：permeate, pervade, penetrate, interpenetrate, diffuse, imbue
5. speak in riddles
6. explain a riddle

1. He got the answer to the riddle as quick as a flash.
   他一下子就猜中了謎底。
2. That painting is still a riddle to us.
   那幅畫對我們?nèi)匀皇莻€謎。
3. He could not solve the riddle.
   他猜不出這個謎。
4. The door was riddled with shots.
   門被子彈打得盡是窟窿。

riddle

v.tr.（及物動詞）
rid.dled,rid.dling,rid.dles
To pierce with numerous holes; perforate:
刺出無數(shù)窟窿；打排孔：
例句：
riddle a target with bullets.
用子彈把耙子打成蜂窩似的

To spread throughout:
充斥，彌漫：
例句：
.Election campaigns have always been riddled with demagogy and worse.(New Republic)
.選舉活動總是充斥了煽動和壞事.(新共和國)

To put (gravel, for example) through a coarse sieve.
篩分：通過粗眼篩子過濾（例如，石子）
n.（名詞）
A coarse sieve, as for gravel.
粗篩：粗眼篩子，如用來篩石子

來源：
Middle English riddlen [to sift]
中古英語 riddlen [篩，精選]
from riddil [sieve]
源自 riddil [篩子，過濾器]
alteration of Old English hriddel * see krei-
古英語 hriddel的變化 *參見 krei-

【引伸】
rid.dler
n.（名詞）

---------------另--------------
riddle
riddle 2

n.（名詞）
A question or statement requiring thought to answer or understand; a conundrum.
謎（語）：需要思考才能回答或理解的問題或陳述；謎語
One that is perplexing; an enigma.
令人困擾的事物，迷惑不解的問題
v.（動詞）
rid.dled,rid.dling,rid.dles
v.tr.（及物動詞）
To solve or explain.
解決，解釋
v.intr.（不及物動詞）
To propound or solve riddles.
提出，解謎
To speak in riddles.
說謎語

來源：
Middle English redels
中古英語 redels
from Old English rôdels * see ar-
源自 古英語 rôdels *參見 ar-

【引伸】
rid.dler
n.（名詞）