κλειθρίον
From LSJ
Ὦ τύμβος, ὦ νυμφεῖον, ὦ κατασκαφὴς οἴκησις αἰείφρουρος, οἷ πορεύομαι πρὸς τοὺς ἐμαυτῆς → Tomb, bridal chamber, eternal prison in the caverned rock, whither I go to find mine own.
English (LSJ)
τό, Dim. of κλεῖθρον, Hero Aut.9.5, al.
German (Pape)
[Seite 1447] τό, dim. von κλεῖθρον, Mathem. vett.