μελλόγαμβρος
From LSJ
εἰς δὲ θεοὺς ἀσεβείας τε καὶ εὐσεβείας καὶ γονέας καὶ αὐτόχειρος φόνου μείζους ἔτι τοὺς μισθοὺς διηγεῖτο → and he had still greater requitals to tell of piety and impiety towards the gods and parents and of self-slaughter
English (LSJ)
ὁ, A about to be a brother-in-law, Hsch.
Greek (Liddell-Scott)
μελλόγαμβρος: ὁ, ὁ μέλλων νὰ γείνῃ γαμβρός, «μελλόγαμβρος· μελλονυμφίος» Ἡσύχ.