molten

Molten describes an object that's reduced to liquid form by heating. You're probably familiar with lava, the molten rock that explodes out of a volcano.

Molten originated from the Old English verb meltian, meaning "become liquid." It takes incredibly high temperatures to get an object that was once rock solid to be transformed into a liquid state. Something much safer than lava has made the term molten popular — molten chocolate cake. This cake has a center that's filled with hot, gooey pudding-like chocolate that oozes out. This is probably the only molten thing you'd ever want to touch.

Definitions of molten
1

adj reduced to liquid form by heating

“a mass of molten rock”
Synonyms:
liquefied, liquified
liquid, liquified, melted
changed from a solid to a liquid state

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