This is the 2111th most frequent Russian word.
сау
"Сау" in Russian is not a standard word; it may be a typo or transliteration. If intended, clarify the context for accurate interpretation.
The word 'сауна' refers to a steam bath or a room used for hot-air baths.
Эта сауна очень уютная.
This sauna is very cozy.
Here, 'сау' is used in its prepositional case form, denoting the location visited.
После тренировки мы ходим в сау.
After training, we go to the sauna.
In this context, 'сауны' is the plural form of 'сауна', referring to multiple saunas.