Translation guide
A flashbang is a non-lethal explosive device that produces a blinding flash of light and a loud noise to disorient people. This entry covers how to refer to the device itself and related concepts in Japanese.
The police used a flashbang to break in.
Loanword from English 'stun grenade'. Common in games and military contexts.
Throw a stun grenade!
Direct loanword from English 'flashbang'. Used mainly in gaming or subculture contexts.
Stun the enemy with a flashbang.
Describing the disorienting effect of a flashbang, not the device itself.
Expressing the action of deploying a flashbang.
In English, 'flashbang' and 'stun grenade' are often used interchangeably. In Japanese, 閃光弾 (flash shell) is the standard term. スタングレネード is understood but less formal. フラッシュバン is gaming slang.
A blinding flash and a roar filled the room.
They threw a flashbang into the room.