ἀχερωίς
From LSJ
διὸ καὶ μεταλάττουσι τὴν φυσικὴν χρῆσιν εἰς τὴν παρὰ φύσιν αἱ δοκοῦσαι παρθένοι τῶν εἰδώλων → therefore those professing to be virgins of the idols even change the natural use into the unnatural (Origen, commentary on Romans 1:26)
Greek (Liddell-Scott)
ἀχερωίς: -ίδος, ἡ, ἀλλαχοῦ καλουμένη λεύκη, Ἰλ. Ν. 389., Π. 482· (ἐκ τοῦ Ἀχέρων, διότι ἐπιστεύετο ὅτι ἐκομίσθη ἐκ τοῦ κάτω κόσμου ὑπό τοῦ Ἡρακλέους, Παυς. 5. 14, 2· πρβλ. Νικ. Ἀλεξιφ. 13, Ἀχ. ὄχθαι): «τὴν δὲ λεύκην πεφυκέναι φασὶ πρὸς τῷ Ἀχέροντι, ὅθεν καὶ ἀχερωΐδα καλεῖσθαι παρ’ Ὁμήρῳ» Ἁρπ. ἐν λέξει λεύκη.
English (Autenrieth)
white poplar, Il. 13.389. (Il.)
Middle Liddell
the white poplar, said to have been brought by Hercules from the banks of Acheron, Il.