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Use "obscurities" in a sentence
"Introduction I have been able to write: Malaria, the history of which not long ago presented such obscurities, is today one of the best known diseases."
"There are certain obscurities that I think should be cleared up."
"Obscure in the sense that it dealt with "obscurities," current jargon for tasks which were too intricate, problematic, sensitive or bloody for the talents and tastes of its contemporaries."