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sheath
-
feature of speech
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constituent
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abnormally
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darling
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aconitum lycoctonum
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activism
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wonk
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thorough
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conundrum
conundrum /kəˈnʌndrəm/
noun
-
A difficult problem
(
brain-teaser
, conundrum
, enigma
, riddle
)
a difficult problem
