Russian declension - Wikipedia
en.wikipedia.org › wiki › Russian_declensionIn Russian grammar, the system of declension is elaborate and complex.Nouns, pronouns, adjectives, demonstratives, most numerals and other particles are declined for two grammatical numbers (singular and plural) and six grammatical cases (see below); some of these parts of speech in the singular are also declined by three grammatical genders (masculine, feminine and neuter).