The article under consideration dwells on the issue beset with morphological peculiarities and the level of usage of the preposition “bar” in the Tajik literary language appertaining to the 18th century (on the example of historical writing referred to as “Tuhfat-ul-khoni” by Muhammadvafo Karminagi). It is underscored that in the prosaic literary production belonging to the 17th and 18th centuries the relevant preposition, like today, is primarily resorted to indicate a direction and place. The importance of the theme explored lies in consideration of morphological peculiarities of the preposition “bar” using comparative-historical and statistical methods, determination of its distinguishing peculiarities based on the scientific-historical writing depicting the historical events of various families of the 18th century. Into the bargain, the given proposition participates in the formation of certain composite adverbs and used as a synonym of other original and compound prepositions. It is worth mentioning that the preposition “bar” in the language of “Tuhfat-ul-khoni” is similar to the modern Tajik literary language structurally and grammatically. Adducing the result of the analysis beset with the theme, explored one can conclude the given preposition occurs to the lesser extent in term of its level of usage than other original ones.
