Meaning

noun (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.

originFrom fire + work(s). The similarity with Dutch vuurwerk and German Feuerwerk, both “fireworks”, is hardly coincidental. Since the word was apparently first attested in English circa 1575, probably from the Dutch (1540), from the German (sense early 16th c.), from Middle High German viurwerc (14th c. as “fuel, firewood”). A spread from the south northwards is also in line with the fact that the…

Etymology from Wiktionary, CC BY-SA 3.0