Hurt
'To hurt,' as mentioned in Revelation 6:6, signifies violation and profanation.
In Revelation 9:4, this signifies perverting the truths and goods of the church by crafty rationalizations from sensory scientific facts and fallacies.
'To be hurt of the second death,' as mentioned in Revelation 2:11, signifies sinking under evils and falsities from hell.
(Reference: Apocalypse Explained 9 [4]; Apocalypse Revealed 316)
2 Kings 10:25
25
And it came to pass, as soon as he had made an end of offering the burnt offering, that Jehu said to the guard and to the captains, Go in, and slay them; let none come forth. And they smote them with the edge of the sword; and the guard and the captains cast them out, and went to the city of the house of Baal.