Parts of speech, comparative concepts and Indo-European linguistics

The paper adopts and further elaborates on the distinction between comparative concepts (CC) and descriptive categories (DC) by proposing a partly new definition of the parts of speech (PoS), and uses that definition to provide a new analysis of PoS in Latin and RV Sanskrit. More, specifically, the paper shows that in Latin three major classes of morphemes are found (nouns, adjectives and verbs), whereas in the RV only two major classes are found (verbal roots and nouns) and the typical “adjective” is a derived stem built on a verbal root meaning a quality (i.e. roughly a nominalization). The data described are then used to contribute to the CC debate in the field of PoS, by showing its relation with historical Indo-European linguistics, by critically analysing traditional labels such as noun, adjective, verb, root, stem and lexeme, and by questioning the alleged incommensurability between CCs and DCs.