Where does “flash grenade” come from?

flash grenade (English) comes from English grenade, from French grenade, from Old French grenate, from Old French pomme grenate, from Italian pom granat, from Medieval Latin pomum granatum, from Latin pōmum, from Latin pōmus — from, off, back; off, away; off, from.

flash grenade (English): A flashbang

Definitions

  1. A flashbang

Ancestry of “flash grenade”, step by step

flash grenade traces back through two separate lines of ancestry.

via English grenade

StepLanguageWordMeaning
1EnglishgrenadeA small explosive device, designed to be thrown...
2Frenchgrenadepomegranate; grenade; insignia, badge
3Old Frenchgrenatepomegranate
4Old Frenchpomme grenatepomegranate
5Italianpom granat
6Medieval Latinpomum granatumseeded fruit; grainy apple; pomegranate
7Latinpōmumany type of fruit (applied to apples, cherries, nuts, berries, figs, dates, etc.)
8Latinpōmusfruit
9Proto-Italicpoomosfruit
10Proto-Indo-Europeanh₂po-h₁ém-ostaken off
11Proto-Indo-Europeanh₂epofrom, off, back; off, away; off, from

via English Flash

StepLanguageWordMeaning
1EnglishFlashA multimedia platform, most often used for adding animation and interactivity to webpages
2Middle Englishflasshen
Every word from Proto-Indo-European h₂epo
flash grenade — Etymology, Origin & Word History | Etymology Explorer