書かき落おとす

godan verb (-su), transitive verb

forget to write; leave out by mistake; omit in writing

Used when someone accidentally fails to include something in a written text, such as a name, word, or detail.

• 名めい簿ぼに彼かれの名な前まえを書かき落おとしてしまった。

  I accidentally left his name off the list.

• 大だい事じな点てんを書かき落おとさないようにメモを取とった。

  I took notes so as not to forget to write down the important points.