Jude 1:15

To execute judgment

(ποιησα κρισιν). "To do justice."To convict

(ελεγξα). First aorist (effective) active infinitive like ποιησα before it.Ungodly

(ασεβεις). See verse Jude 1:4 and end of this verse.Of ungodliness

(ασεβειας). Old word as in Romans 1:18, plural in Judges 1:18 as in Romans 11:26.Which

(ων). Genitive by attraction from α (cognate accusative with ησεβησαν, old verb, to act impiously, here alone in N.T. save some MSS. in 2 Peter 2:6) to agree with the antecedent εργων (deeds).Hard things

(σκληρων). Harsh, rough things as in John 6:60.Which

(ων). Genitive by attraction from α (object of ελαλησαν, first aorist active indicative of λαλεω) to the case of the antecedent σκληρων. Four times in this verse as a sort of refrain ασεβεις (twice), ασεβειασ, ησεβησαν.