godan verb (-su)
begin to dissolve; start melting out
Describes the process of something solid starting to dissolve or melt and flow out, often from within something else. Emphasizes the beginning or gradual emergence of dissolved material.
雪が溶け出して、川の水が増えた。
The snow began to melt, and the river water rose.
砂糖がコーヒーに溶け出す。
The sugar starts to dissolve into the coffee.