'Terribly' in the Bible

They [the stricken, deprived of all in which they had trusted] will go into the caves of the rocksAnd into the holes of the ground [fleeing]From the terror and dread of the LordAnd from the splendor of His majesty,When He arises to terrify the earth.

To go into the caverns of the rocks and into the clefts of the [ragged] cliffs [as they flee]From the terror and dread of the Lord and the splendor of His majesty,When He arises to terrify the earth.