
There are four genders in the Russian language

In addition to masculine, feminine and neuter, there is also a common gender.
In Russian, the gender of a noun determines the endings of other words in a sentence.
Grammatical gender can be masculine ('отец' – 'father'), feminine ('мать' – 'mother'), and neuter ('окно' – 'window'). But, there are also many words of the common gender, since they can denote persons of both masculine and feminine gender. For example, 'коллега' (“he is a colleague”, “she is a colleague”).
Words that have only plural forms (‘pants’, ‘glasses’) have no gender at all.