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drill bit
-
disconcerted
-
sanction
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vanguard
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exemplary
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dalliance
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boob
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conduction aphasia
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those
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twilight
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conundrum
conundrum /kəˈnʌndrəm/
noun
-
A difficult problem
(
brain-teaser
, conundrum
, enigma
, riddle
)
a difficult problem
