No. 8,048 in Russian
кристиной
"Кристиной" is the instrumental case of the name "Кристина," meaning "by/with Kristina" in English.
In a sentence
Я познакомился с Кристиной в парке.
I met Kristina in the park.
In this sentence, 'Кристиной' is the instrumental case of the proper noun 'Кристина', used after the preposition 'с' (with) indicating companionship.
Мой друг всегда делится своими историями с Кристиной.
My friend always shares his stories with Kristina.
Here, 'Кристиной' is used in the instrumental case post the preposition 'с' to indicate the recipient of the action.
Она работает бок о бок с Кристиной.
She works side by side with Kristina.
In this case, 'Кристиной' in the instrumental form denotes a collaborative or accompanying manner.
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