ψευδάδελφος
From LSJ
οὐδ' ἄμμε διακρινέει φιλότητος ἄλλο, πάρος θάνατόν γε μεμορμένον ἀμφικαλύψαι → nor will anything else divide us from our love before the fate of death enshrouds us (Apollonius of Rhodes, Argonautica 3.1129f.)
English (LSJ)
[ᾰ], ὁ,
A false brother, pretended Christian, 2 Ep.Cor. 11.26, Ep.Gal.2.4, Gloss.
German (Pape)
[Seite 1393] ὁ, falscher, unächter Bruder, Sp.