noun
rejuvenating water
Archaic term referring to mythical water that restores youth. Found in classical Japanese texts and folklore.
古典文学には、変若水を飲んで若返る話が登場する。
In classical literature, stories appear of people drinking rejuvenating water and regaining their youth.
The exact derivation is uncertain; the kanji 変若 (change + young) and 復 (restore) suggest the idea of regaining youth.