'Fierce' in the Bible

On His arrival at the other side, in the country of the Gadarenes, there met Him two men possessed by demons, coming from among the tombs: they were so dangerously fierce that no one was able to pass that way.

And if Satan really has engaged in fierce conflict with himself, how shall his kingdom stand?--because you say that I expel demons by the power of Baal-zebul.

The day of the Lord will come like a thief--it will be a day on which the heavens will pass away with a rushing noise, the elements be destroyed in the fierce heat, and the earth and all the works of man be utterly burnt up.

eagerly looking forward to the coming of the day of God, by reason of which the heavens, all ablaze, will be destroyed, and the elements will melt in the fierce heat?

For this reason be glad, O Heaven, and you who live in Heaven! Alas for the earth and the sea! For the Devil has come down to you; full of fierce anger, because he knows that his appointed time is short."

The great city was split into three parts; the cities of the nations fell; and great Babylon came into remembrance before God, for Him to make her drink from the wine-cup of His fierce anger.

From His mouth there comes a sharp sword with which He will smite the nations; and He will Himself be their Shepherd, ruling them with a scepter of iron; and it is His work to tread the winepress of the fierce anger of God, the Ruler of all.