Went and poured out (απηλθεν κα εξεχεεν). Second aorist active indicative of απερχομα (redundant use like υπαγετε with εκχεετε, "go and pour out," in verse Revelation 16,1Offenbarung 16,3Offenbarung 16,4Offenbarung 16,8Offenbarung 16,10Offenbarung 16,12Offenbarung 16,17

Into the earth (εις την γην). This same use of εις after εξεχεεν in verses Revelation 16:3; Revelation 16:4.

It became (εγενετο). "There came" (second aorist middle indicative of γινομα).

A noisome and grievous sore (ελκος κακον κα πονηρον). "Bad and malignant sore." Hελκος is old word for a suppurated wound (Latin ulcus), here, verse Revelation 16:11; Luke 16:21. See the sixth Egyptian plague (Exodus 9:10; Deuteronomy 28:27; Deuteronomy 28:35) and Job 2:7. The magicians were attacked in Egypt and the worshippers of Caesar here (Revelation 13:17; Revelation 14:9; Revelation 14:11; Revelation 19:20)