挟はさみ込こむ

godan verb (-mu), transitive verb

insert; put between; tuck into

Used for physically placing something between two things, such as pages, fingers, or layers.

• 本ほんの間あいだにしおりを挟はさみ込こむ。

  I insert a bookmark between the pages of the book.

• 指ゆびをドアに挟はさみ込こまないように気きをつけて。

  Be careful not to get your fingers caught in the door.