What describes metal or rock in a liquid state because of great heat?

The term that describes metal or rock in a liquid state due to high temperatures is "molten." When materials such as metals or rocks are heated to a point where they lose their solid structure and become liquid, they are said to be in a molten state. This process is commonly observed in geology during volcanic activities, where magma becomes liquid rock capable of flowing due to extreme heat.

The other terms do not appropriately describe this state. "Solidified" refers to the process of becoming solid again, which is the opposite of being in a liquid state. "Veined" typically refers to the presence of veins within solid materials, indicating a pattern or texture rather than a state of matter. "Fused" generally conveys a similar meaning to melted or combined through heat, but it doesn’t specifically denote a liquid state as clearly as "molten" does within the context of metals or rocks.