Greek word

theîon

θεῖον

What it means

sulphur

Where it comes from

probably neuter of theîos (θεῖος) (in its original sense of flashing)

How the King James translates it

brimstone5

Every place it appears 5

Luke17:29

Revelation9:18 14:10 20:10 21:8

theîon — Greek word meaning “sulphur”