This is the 8627th most frequent Russian word.
основ
The Russian word "основ" is the genitive plural form of "основа," meaning "foundations," "bases," or "principles."
Used as 'основной' to mean 'main' or 'primary', describing the central characteristic of 'principle'.
Основной принцип этого подхода заключается в его универсальности.
The main principle of this approach lies in its universality.
Used as 'основе' (prepositional case) to mean 'basis', referring to the foundational data supporting the research.
Эти данные лежат в основе нашего исследования.
This data forms the basis of our research.
Used as 'основы' (plural) to mean 'basics' or 'fundamentals', referring to the essential knowledge of mathematics.