godan verb (-ru), intransitive verb
clear up; become cloudless
Describes the sky becoming completely clear and bright, often after rain or clouds. Emphasizes a wide, unobstructed blue sky.
朝には雨が上がり、空はすっかり晴れ渡った。
The rain stopped in the morning and the sky cleared up completely.
晴れ渡った青
We enjoyed a picnic under the cloudless blue sky.