καστροφύλαξ
From LSJ
τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life
Greek Monolingual
καστροφύλαξ, και καστροφύλακας, ὁ (Μ)
επόπτης, φύλακας, υπερασπιστής του κάστρου.