湯風呂
Meanings
1
A bath where steam is used, similar to a 蒸し風呂. The cross-reference suggests a connection to steam bathing.
See also: 蒸し風呂
I relaxed and sweated in the steam bath at the inn.
2
hot water bath
A bath filled with hot water, as opposed to a steam bath. This is the more common modern meaning.
On a cold day, I want to soak in a hot water bath.