This is the 9630th most frequent Russian word.
хэллоуином
The Russian word "хэллоуином" is the instrumental case of "Хэллоуин," meaning "Halloween."
In this sentence, 'хэллоуином' signifies the methodology or theme of celebrating the holiday by involving Halloween-related activities.
Мы решили отметить хэллоуином этот страшный праздник.
We decided to celebrate this spooky holiday with Halloween.
Here, 'хэллоуину' is used in the instrumental case to indicate the reason for the fun nature of the party.
Эта вечеринка была такой забавной благодаря хэллоуину.
This party was so fun thanks to Halloween.
In this sentence, 'хэллоуином' describes the style or theme of the decorations.