subobscurus
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)
Latin > English (Lewis & Short)
sŭb-obscūrus: a, um, adj.,
I somewhat obscure; trop., of language: breves et ob eam ipsam causam interdum subobscuri, Cic. Brut. 7, 29: ingressio, id. Or. 3, 11: cicatrix, Vulg. Lev. 13, 21.—Adv.: sŭbob-scūrē, somewhat obscurely: dixit, Gell. 10, 1, 7: explicat, id. 3, 14, 6.