noun
valley spring; spring gushing from a valley
Refers to a natural spring emerging from a valley or mountain ravine. A somewhat literary or descriptive term.
山奥の渓泉の水は冷たく澄んでいた。
The water of the valley spring deep in the mountains was cold and clear.
Compound of 渓 (valley) and 泉 (spring). The exact historical derivation is uncertain, but the meaning is transparent from the kanji.