διαβάθρα
From LSJ
Βέβαιον οὐδέν ἐστιν ἐν θνητῷ βίῳ → Nihil, ut videtur, proprium in vita datur → Nichts Festes gibt's im Leben eines Sterblichen
English (LSJ)
ἡ,
A ladder, Aristeas 106, Str.16.2.40, D.H.5.41, etc.: esp. ship's gangway, PPetr.2p.38 (iii B. C.). II drawbridge, Apollod.Poliorc.170.1,al.: generally, bridge, PSI5.543 (iii B. C.).