The given article dwells on the morphological peculiarities of the prefixoid ‘khush-’ in 18th-century Tajik literary language, based on the historical work “Tukhfat-ul-khoni” by Muhammadvafoi Karminagi. The study identifies ‘khush-’ as a semi-affixal element that occupies an intermediate position between a root morpheme and a prefix, actively participating in the formation of compound adjectives. Through a contextual analysis of linguistic examples extracted from the source text, the research delineates the semantic nuances, syntactic functions, and productivity of ‘khush-’. The findings reveal that while ‘khush-’ retains its original lexical meaning of “pleasant” or “good,” it serves as a highly productive derivational component. A comparative analysis demonstrates that its functional range is narrower than that of the prefixoid ‘pur-’ but exhibits distinct stylistic and semantic specialization. The article concludes that the study of such transitional morphemes in historical texts is essential for understanding the evolution of word-formation systems in the Tajik language.