Meaning

verb reduce or cause to be reduced from a solid to a liquid state, usually by heating

adjective reduced to liquid form by heating

verb become or cause to become soft or liquid

originFrom Middle English molten, from Old English molten, ġemolten (“melted, molten”), from Proto-Germanic *multanaz, past participle of Proto-Germanic *meltaną (“to melt”). Cognate with Scots moltin, Swedish multen.

Etymology from Wiktionary, CC BY-SA 3.0