noun
spring water; welling water; spring
Formal or literary term for water naturally emerging from the ground; often used in environmental, geographical, or poetic contexts.
この地域は湧水が豊富で、昔から人々の生活を支えてきた。
This area has abundant spring water and has supported people's lives since ancient times.
山の湧水は冷たくて、とても美味しい。
The spring water from the mountain is cold and very delicious.
Compound of 湧 (yu, 'to well up') + 水 (sui, 'water'). The kanji 湧 is the modern standard form; 涌 is an older variant.