Other forms: saunas
A sauna is a hot wooden room you sit in to sweat. Benches, a stove, and stones you throw water on for steam.
It is Finnish in origin and Finland has more of them than cars. The traditional sequence is heat, then cold water or snow, then heat again. The word is one of very few Finnish words in general English. Gyms and hotels have them everywhere now. Note that a sauna is dry heat with bursts of steam, while a steam room is wet heat throughout.
1nounsaunaA small heated room used for sweating and relaxation.
“There is a sauna next to the pool.”
Proto-Indo-European
*(s)teg- (pole)
Finnish
sauna
English, today
sauna
Finnish sauna. Possibly a a doublet of stack.
Etymology from Wiktionary, CC BY-SA