ἀχλύω
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)
English (LSJ)
aor. 1 ἤχλῡσα,
A to be or grow dark, ἤχλυσε δὲ πόντος ὑπ' αὐτῆς (sc. νεφέλης) Od.12.406; ὄμματα δ' αὔτως ἤχλυσαν A.R.3.963. II trans., darken, Q.S.1.598, Nonn.D.4.368, Pancrat.Oxy. 1085.12.