'Heavy' in the Bible

When the king of Moab saw that the battle was too heavy for him, he took with him seven hundred men who drew the sword to break through to the king of Edom, but they were not able.

So the king of Assyria sent the commander in chief, the chief eunuch, and the {chief advisor} from Lachish to King Hezekiah at Jerusalem with a heavy army. They went up and came [to] Jerusalem, then they went up and came and stood at the aqueduct of the upper pool which is on the main road of the {washer's} field.