crystal

kristalli

kide

kellonlasi puhekieltä A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.
puhekieltä A piece of glimmering, shining mineral resembling ice or glass.
puhekieltä A fine type of glassware, or the material used to make it.
puhekieltä crystal meth: methamphetamine hydrochloride.
The glass over the dial of a watch case.
Very clear.

"Do I make myself clear?" / "Crystal."