πενθείω
From LSJ
Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
English (Autenrieth)
du. πενθείετον, inf. πενθήμεναι, aor. inf. πενθῆσαι: mourn, mourn for; τινά, Il. 23.283; γαστέρι, ‘by fasting,’ Il. 19.225.
Russian (Dvoretsky)
πενθείω: эп. = πενθέω.