Mastery in spanish
                    Maestría
pronunciation: mɑestɹ̩iɑ part of speech: noun
            
            pronunciation: mɑestɹ̩iɑ part of speech: noun
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            mastery = dominio, control, autoridad, profesionalidad.
Example: The library has proven to be an imperfect panacea, and the librarian has suffered a definite loss of mastery.