This is the 14235th most frequent Russian word.
основание
"Основание" in English means "basis," "foundation," or "ground."
In this sentence, 'основание' refers to the foundation or base of a structure.
Основание дома требует тщательной подготовки.
The foundation of the house requires careful preparation.
Here, 'основание' is used to mean basis or reasoning for an action or conclusion.
На каком основании вы сделали такой вывод?
On what basis did you make such a conclusion?
In this instance, 'основание' is utilized to indicate the base of a geometric figure.