"Vitrified" is a word in ENGLISH

Not admitting of being vitrified, or converted into glass.

Half or imperfectly vitrified; partially converted into glass.

Capable of being vitrified, or converted into glass by heat and fusion; as, flint and alkalies are vitrifiable.

To convert into glass; to vitrify.

To become glass; to be converted into glass.

To convert into, or cause to resemble, glass or a glassy substance, by heat and fusion.