cidar
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
cĭdăr, ăris, n., Fort. Carm. 2, 9, 33 et cĭdăris, is, f., Curt. 3, 3, 19, diadème des rois de Perse