expression, ichidan verb
think; use one's head; exercise one's brains
Idiomatic expression meaning to actively engage one's mind, think carefully, or figure something out. Often used when someone needs to use their intelligence to solve a problem or come up with an idea.
もっと頭を働かせて、いいアイデアを出してください。
Use your head more and come up with a good idea.
He always uses his brains to solve difficult problems.