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antidorcas
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damp
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usability
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direction
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settled
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read between the lines
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subsidy
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concisely
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accommodation reflex
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mandarin orange tree
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conundrum
conundrum /kəˈnʌndrəm/
noun
-
A difficult problem
(
brain-teaser
, conundrum
, enigma
, riddle
)
a difficult problem
