This document discusses the grammatical classification of words. It outlines the different levels of language, including the lexemic or word level. There are several ways words can be classified grammatically, including semantically, formally, and functionally. Traditionally, words are divided into parts of speech, which are further divided into notional parts of speech, which have complete meaning on their own, and functional parts of speech, which have relational meaning. The main parts of speech are noun, pronoun, verb, adverb, adjective, numeral, article, particle, conjunction, interjection, and preposition. There is also a three-layer classification of words proposed by M. Blokh, with notional words in the top