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aciduric
-
chosen
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frustration
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tire out
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intricacies
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locust bean
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fagales
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acrogenic
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sped
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prove
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conundrum
conundrum /kəˈnʌndrəm/
noun
-
A difficult problem
(
brain-teaser
, conundrum
, enigma
, riddle
)
a difficult problem
