dread: overwhelming fear that grips a person or sweeps over a people, and by extension the dreadful thing that causes it
This is one of the strongest fear words in the Hebrew Bible. It is not mild worry but the kind of terror that makes the body shake, the kind that strikes suddenly and overpowers. The same word names both sides of that experience: the fear felt on the inside, and the frightening thing on the outside that produces it.
Three shades grow out of that single core. Most often it is the raw emotion: panic in the night, terror that seizes a person and will not let go. From there it points outward to the dread that one party inspires in another, especially the dread God sends ahead of his people so that whole nations lose their nerve before a battle is even fought. And by a natural turn it can name the disaster itself, the looming calamity spoken of as the dread that is coming.
Alongside these stands a quieter use: the proper dread owed to God, an awe so deep it makes the flesh tremble, the reverence a wrongdoer lacks when there is no fear of God before his eyes.
Two verses in Genesis use the word as a title for God himself, the Dread of Isaac, and scholars have long debated exactly what that title claims (see the disputes note).