the.com/flamethrower

means A weapon that shoots a stream of ignited fuel to incinerate targets at a distance.

from A straightforward compound of 'flame' and 'thrower' — the word names exactly what the device does. Early versions appeared in the early 20th century (German 'Flammenwerfer' is a direct parallel), developed for trench warfare where soldiers needed to project fire into enemy positions and fortifications without closing to arm's length. The engineering problem was ancient — Byzantine 'Greek fire' is a famous forerunner — but the modern portable, fuel-tank-and-ignition version, and the word for it, are a product of industrial-age warfare.