No. 6,151 in Russian
существования
The word "существования" in English means "existence."
In a sentence
Мир часто задаёт вопросы о смысле существования.
The world often questions the meaning of existence.
The word 'существования' ('existence') is used here as a noun in the genitive case, denoting the concept being questioned.
Условия существования на планете сильно изменились.
The conditions of existence on the planet have changed significantly.
In this instance, 'существования' refers to the circumstances surrounding existence, again in the genitive case, showing possession or relation.
Он написал философский труд о природе существования.
He wrote a philosophical work on the nature of existence.
'существования' is used to specify the subject being studied or discussed ('existence'), appropriate to its genitive case to match the preposition 'о'.
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