structural:expansion, stylistic:tone, linguistic:voice_change, stylistic:style_transfer
Etymology

The word lava comes from Italian and is probably derived from the Latin word labes, which means a fall or slide. An early use of the word in connection with extrusion of magma from below the surface is found in a short account of the 1737 eruption of Vesuvius, written by Francesco Serao, who described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of the volcano (a lahar) after heavy rain.