A lexeme (word) is a phoneme string, having an autonomous, complete meaning. It can be understood as the instrument of the thought transfer. The richer the vocabulary of a language is and the more specified the meaning of its lexemes is, the more exact the thoughts can be delivered in it.

Lexemes, as regards their functions, can be classified as follows:

3•1. The Noun (اسم)

3•2. The Particle (حرف)

3•3. The Verb (فعل)