No. 14,238 in Russian
основателем
"Основателем" means "founder" in English.
In a sentence
Иван считается основателем этой компании.
Ivan is considered the founder of this company.
Here, 'основателем' is the instrumental case of the noun 'основатель' (founder), indicating the person who did the founding.
Она говорила об основателе движения, вдохновившего её.
She spoke about the founder of the movement that inspired her.
In this sentence, 'основателе' is the prepositional case, used because the phrase is responding to 'о' (about), referring to the topic or subject of conversation.
Мы должны показать уважение основателям наших традиций.
We must show respect to the founders of our traditions.
Here, 'основателям' is the dative plural form, used to indicate the indirect objects of the action of 'показать уважение' (show respect).
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