'Severe' in the Bible

And the Egyptians made the Israelites serve rigorously [forcing them into severe slavery].

And Yahweh did so, and a {severe} [swarm of] flies came to the house of Pharaoh and the house of his servants and in all the land of Egypt; the land was ruined because of the flies.

then the Lord’s hand will bring a severe plague against your livestock in the field—the horses, donkeys, camels, herds, and flocks.

Look! About this time tomorrow, I'll send a severe hail storm, such as has not happened in Egypt from the day it was founded until now.

The hail, with lightning flashing through it, was so severe that nothing like it had occurred in the land of Egypt since it had become a nation.

The locusts went up over all the land of Egypt and settled down in all the territory of Egypt. It was very severe; there had been no locusts like them before, nor will there be such ever again.