English

flash grenade

From flash + grenade.

A compound of flash + grenade

Middle English flasshen ‘to splash’

English flash

Latin grānātum ‘having grains’

…

Italian pom granat

Old French pomme grenate ‘pomegranate’

Old French grenate ‘pomegranate’

French grenade ‘pomegranate’

Today it means

noun A flashbang.

Language periods are conventional ranges, not dates for this word.

Etymograph / flash grenade