κογχύλιον
From LSJ
ὁ λόγος τοῦ Θεοῦ οὐ δέδεται → the word of God will not be dishonoured, the word of God will not be dishonored
English (LSJ)
τό, Dim. of κογχύλη,
A small kind of mussel or cockle, Epich.42.1, Sophr.24, Arist.HA547b7, PA 661a22, al., POxy.1449.21 (iii A.D.). 2 any mollusc or its shell, Hdt.2.12, Hp.Vict.2.48, Diocl.Fr.133; used to cover seals, Sch.Ar. V.583; fossil shell, Plu.2.367b. II = κόχλος, Crito ap.Gal.12.660, Dsc.2.8.