浮うきつ沈しずみつ

expression, noun or participle which takes 'suru'

bobbing up and down; rising and falling

Describes something repeatedly moving up and down, often on water or in a fluctuating situation. Used as a set phrase, often with する.

• 小こ舟ぶねが波なみに浮うきつ沈しずみつしている。

  The small boat is bobbing up and down on the waves.

• 彼かれの気き分ぶんは一いち日にち中じゅう浮うきつ沈しずみつだった。

  His mood was rising and falling all day.