1.
hot water, heated water
Water that has been heated, as opposed to cold water.
2.
bath water
Hot water prepared for bathing.
Let me know when the bath is ready.
たまる means 'to accumulate'; here it refers to the bathtub filling up
お湯 is the everyday word for hot water. The お is a beautifying prefix, but it is almost always used; 湯 alone sounds old-fashioned or literary.
Common patterns
- お湯を沸かす (to boil water)
- お湯を入れる (to pour/add hot water)
- お湯が出る (hot water comes out)
- お湯に入る (to take a bath)
Related words
Watch out
Japanese has no one word for water of any temperature: cold or room-temperature water is 水, heated water is お湯. "Hot water" is never 熱い水.
Related Words
Compare:
水 (cold water)
Related:
やかん (kettle)
Related:
温い (lukewarm)
Related:
熱い (hot)
Compare:
お水 (water (polite form))
Compare:
温水 (warm water)