This is the 9666th most frequent Russian word.
челси
"Челси" in Russian refers to "Chelsea," which can signify the football club or the London district.
Here, 'Челси' refers to a brand that could be associated with the name Chelsea.
Я купил новые кроссовки от бренда Челси.
I bought new sneakers from the Chelsea brand.
In this sentence, 'Челси' refers to the football team from the city-name Chelsea.
Футбольный клуб Челси успешно завершил сезон.
The Chelsea football club successfully finished the season.
Here, 'Челси' is used as a proper noun indicating a location or street.