6 which in anger struck down peoples with unceasing blows, and in fury subdued nations with relentless aggression.

Read Isaiah 14:6 Using Other Translations

He who smote the people in wrath with a continual stroke, he that ruled the nations in anger, is persecuted, and none hindereth.
that struck the peoples in wrath with unceasing blows, that ruled the nations in anger with unrelenting persecution.
You struck the people with endless blows of rage and held the nations in your angry grip with unrelenting tyranny.