English
thunderflash
From thunder + flash.
Today it means
noun A pyrotechnic device that generates a loud noise, used to simulate battlefield conditions.
Sources
Sources: Wiktionary, “thunderflash”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / thunderflash