noun
sauna
SAW-nuh/ˈsɔːnə/
A heated room or a session in it for sweating and relaxation.
The two men relax and perspire on wooden benches inside the sauna.

Etymology
The Finnish word names both the steam bath and the room where it is taken. The selected meaning focuses on the place rather than the bathing practice.
In context
when I go to the gym and I go in the sauna or steam room I can't bring my phone because it's too hot
More examples
- The gym has a sauna beside the locker room.
- We enjoy a sauna after a long day of hiking.
- Guests sit on wooden benches inside the sauna.
Forms
sauna · saunas
Similar words
- steam room
- Uses moist heat rather than the typically drier sauna heat.
- steam bath
- A sweating session in steam rather than mostly dry heat.