mirror
/ˈmɘ.ɹɘ/
A smooth surface, usually made of glass with reflective material painted on the underside, that reflects light so as to give an image of what is in front of it.
I had a look in the mirror to see if the blood had come off my face.
An object, person, or event that reflects or gives a picture of another.
His story is a mirror into the life of orphans growing up.
A disk, website or other resource that contains replicated data.
Although the content had been deleted from his blog, it was still found on some mirrors.
A mirror carp.
A kind of political self-help book, advising kings, princes, etc. on how to behave.