1.
source, spring, fountainhead
The point where water naturally emerges from the ground. Particularly used for hot spring sources.
この温泉は源泉かけ流しだ。
This hot spring uses free-flowing water directly from the source.
源泉の温度は90度を超える。
The temperature at the source exceeds 90 degrees.
新しい源泉が発見された。
A new hot spring source was discovered.
2.
source, origin, wellspring
The fundamental origin or root cause of something abstract, such as the source of creativity, wealth, or power.
好奇心は創造力の源泉だ。
Curiosity is the wellspring of creativity.
富の源泉は知識にある。
The source of wealth lies in knowledge.
この地域の活力の源泉は住民の団結力にあると思う。
I think the source of this region's vitality lies in the unity of its residents.
USAGE:
In the hot spring context, 源泉かけ流し (free-flowing source water) is a prized feature of Japanese hot springs, meaning the water comes directly from the natural source without recirculation. This is a key selling point for onsen.
源泉徴収 (withholding at source) is also a common compound used in tax contexts.
Not to be confused with the homophone 厳選 (careful selection).
COMMON COLLOCATIONS:
- 源泉かけ流し: free-flowing source water
- 源泉徴収: withholding at source (tax)
- 活力の源泉: source of vitality
- 力の源泉: source of power