What does サウナ mean?
サウナ is a Japanese noun meaning “sauna” in English. It is written as サウナ in hiragana, and sauna in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
軟木の絶縁された部屋およびよいヒーターはサウナのための絶対必要である。
An insulated soft-wood room and a good heater are the absolute necessities for a sauna.