vitrify

To change or make into glass or a glassy substance, especially through heat fusion.

To become vitreous.

To convert into glass by the action of heat. See glass.

To become glass; be converted into glass.

To become glass; to be converted into glass.

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

to be made into glass, especially through heat

undergo vitrification; become glassy or glass-like

change into glass or a glass-like substance by applying heat