Derivatives with affixes from a Latin or a Greek neologism (typical of the old period of Romanian) are one of the features of the literary language of Metropolitan Dosoftei’s work that can be rarely found in this period, however, they can be found, to some extent, in Cantemir’s work, according to the Thesaurus Dictionary of the Romanian Language. Adopting and applying a useful concept from A. Philippide–G. Ivănescu’s doctrine in philology and linguistics, we believe that Dosoftei’s characteristic literary language is determined by features of his psychological/spiritual basis.