This is the 8980th most frequent Russian word.
расплавленный
Molten.
The word 'расплавленный' here is used as an adjective describing the state of the metal, referring to it being melted.
Расплавленный металл заполнил форму.
The molten metal filled the mold.
In this sentence, 'расплавленный' is describing ice that has melted due to heat.
Под солнцем лёд стал расплавленным.
Under the sun, the ice turned molten.
This usage of 'расплавленный' is metaphorical, showing an emotional state resembling the softness and malleability of molten material.