刻骨銘心

to carve; to engrave; to cut; a moment; a quarter hour; oppressive; to remember firmly; to harm or exploit; to limit; deep (degree)

Bone; skeleton; the hard framework of an animal's body; a supporting structure; character; spirit; backbone.

To engrave or inscribe characters on an object; an inscribed motto or inscription; to remember unforgettably.

The physical heart; the mind or intellect; feelings or emotions; the center or core of something; intention or will.