The article under consideration dwells on the issue concerned with the peculiarity of suffixes deriving original adjectives in one of the translated works belonging to the epoch of Samanids᾿ dynasty – “Tarjumai ‘Tafsir Tabari’ ” (“Translation of Tabari᾿s Commentary”). In the course of conducting an analysis beset with the theme explored the author of the article determines that the relevant word-building element compared with the original Tajik words is added to borrowed Arabic ones thus deriving new lexical units. Into the bargain, it is shown that a part of derivative original adjectives are attached to the words denoting negative meanings. Adducing the results of the analysis beset with the words derived by the relevant suffix the author of the article concludes that none of them are used equally: some of them are used frequently, others are used moderately, and the third group is used rarely