Meaning

noun the property of being smooth and shiny

verb polish and make shiny

originThe verb is derived from Middle English burnishen, burnysshen (“to polish, burnish; (figuratively) to brighten, give lustre to; to clean (something) until shiny; to decorate (with something shiny), adorn”) [and other forms], from burniss-, a stem of Old French burnir (compare, for example, the first-person present singular indicative form burnis), a variant of brunir (“to make clean and shiny,…

Etymology from Wiktionary, CC BY-SA 3.0