אֲפֵלָה

τούτου δὲ συμβαίνοντος ἀναγκαῖον γίγνεσθαι πάροδον καὶ τροπὰς τῶν ἐνδεδεμένων ἄστρων → but if this were so, there would have to be passings and turnings of the fixed stars

English (Strong)

feminine of אָפֵל; duskiness, figuratively, misfortune; concrete, concealment: dark, darkness, gloominess, X thick.