書かき下おろす

godan verb (-su), transitive verb

write a new work; write specially for

Used when an author creates an original piece (novel, play, song, script, etc.) specifically for a particular occasion, publication, or performance, rather than reusing existing material.

• この雑ざっ誌しのために、人にん気き作さっ家かが短たん編ぺん小しょう説せつを書かき下おろした。

  A popular author wrote a new short story specially for this magazine.

• 彼かの女じょは映えい画がのために主しゅ題だい歌かを書かき下おろした。

  She wrote a theme song specifically for the movie.

• 今こん回かいの公こう演えんでは、劇げき作さっ家かが新しん作さくを書かき下おろす予よ定ていだ。

  For this performance, the playwright plans to write a new work.