The article dwells on the issue concerned with the comparative analysis of the word-building and morphological features of the suffix -ча and its English equivalents on the example of “A brief word-building dictionary of Tajik literary language” (1983) and “Tajik-English dictionary” (2005). The dictionaries under study are considered to be one of the priceless and fundamental sources contained a numerous literary facts and evidences belonging to modern Tajik literary language. In the course of the research the author of the article makes an endeavour to carry out the English equivalents of Tajik derivative words formed by virtue of the suffix -ча and composed by the word “бача”/“baby” those ones are not identical and the majority of them are used and translated into English as simple, derivative, compound, composite ones and phrases. It is concluded that the relevant word-building element is considered to be one of productive ones contributed into animals’ cub derivation.
