vitrified

"The children were happily playing in the sandbox, building sandcastles and digging holes. "

"The alchemists sought to transform lead into gold."

"A kettle converts water into steam."

"The scientist carefully examined the substance to determine its chemical composition. "

"My sister is very helpful, especially when it comes to organizing things. "

"The school trip to the volcano national park was exciting. "

"The extreme of the workday was the three-hour meeting. "

"The car was turning left at the intersection. "

"They were all converts to Islam."

"The twins resemble each other."

"The large oak tree surrounding the picnic area provided welcome shade. "

"The teacher's voice was intense as she explained the difficult math problem. "