想そうを練ねる

expression, godan verb (-ru)

think deeply; turn over in one's mind

Used when carefully considering a matter, refining one's thoughts, or mulling something over. Often implies a deliberate, reflective process.

• 彼かれは新あたらしい企き画かくについて想そうを練ねっている。

  He is thinking deeply about the new project.

• 一ひと晩ばん中じゅう想そうを練ねった末すえ、良よいアイデアが浮うかんだ。

  After turning it over in my mind all night, a good idea came to me.