This is the 10050th most frequent Russian word.
атмосферой
The Russian word "атмосферой" means "atmosphere" in English (instrumental case).
This sentence illustrates the use of 'атмосферой' in the instrumental case to describe the prevailing mood or ambiance.
Парк был наполнен спокойной атмосферой.
The park was filled with a calm atmosphere.
Here, 'атмосферой' is used to describe a person's aura or the impression they give off, again in the instrumental case.
Она очаровывала всех своей атмосферой таинственности.
She enchanted everyone with her atmosphere of mystery.
The word 'атмосферой' is employed in this context to describe the emotional or social ambiance of a location, once more in the instrumental case.