A bath or room filled with steam, similar to a sauna but using moist heat.
旅館の蒸し風呂で汗を流した。
I sweated it out in the inn's steam bath.
風呂 is a general bath, while 蒸し風呂 specifically refers to a steam bath.
Standard spelling with okurigana.
Variant spelling without okurigana; less common but still used.
Compound of 蒸し (steaming) + 風呂 (bath).