The article attempts to establish a connection between the linguistic theories of F.F. Fortunatov and A.A. Potebnya. It is known that in nouns that name people and animals important to humans, the grammatical meanings of gender indicate their biological sex. As for the nouns that name inanimate objects, as well as some other animals, their grammatical meanings of gender for quite a long time were estimated by linguists as relics of an ancient form of thinking incomprehensible to modern people. However, if we consider the grammatical meanings of gender as a component of the inner form of the word, it becomes clear that when creating words, the meanings of the masculine gender were used to indicate the presence of such properties in objects that are inherent in male beings, such as their relatively greater activity, larger size, greater strength and greater independence. In turn, feminine grammatical meanings reflected the absence of these properties. The article emphasizes the similarity between the grammatical meanings of gender of nouns and the inner forms of words in their traditional lexicological understanding: (1) in different languages, the names of the same objects can have different grammatical gender meanings, (2) at the time of the appearance of a word, its inner form indicate the connection between the word and its lexical meaning, but over time inner forms can be obscured or lost, (3) like the traditional inner forms, the grammatical meanings of gender can either represent one of the components of the lexical meaning of the word, or may be part of its connotations.