Well it’s not their word for hell, that’s the point. It means death or grave, the idea of hell wasn’t even considered until the Greek started being converted in the first and second century and folded their ideas about the afterlife (including their underworld ‘hel’) into the mix of Jewish belief about death being non-existence and resurrection being the return from non-existence.
That’s how we get the two testaments treating death differently, and the conflation of the word “sheol” to mean hell, when it really just meant being dead.