Revelation 9:2

Opened

(ηνοιξεν). First aorist active indicative of ανοιγνυμ. With the "key" (κλεις).As the smoke of a great furnace

(ως καπνος καμινου μεγαλης). The plague of demonic locusts is here turned loose. Καμινος is old word for a smelting-furnace, already in Revelation 1:15.Were darkened

(εσκοτωθη). First aorist passive indicative of σκοτοω, old causative verb from σκοτος, in N.T. only here, Revelation 16:10; Ephesians 4:18.By reason of

(εκ). "Out of," as a result of (Revelation 8:13).