'Unable' in the Bible

So {the anger of Yahweh was kindled} against Israel, and he gave them into the hand of plunderers; and they plundered them, and he sold them into the hand of their enemies from all sides. They were unable to withstand their enemies any longer.

But if you are unable to explain it to me, you must give me thirty linen garments and thirty festal garments." So they said to him, "Tell your riddle; let us hear it."

He said to them, "From the eater came out food, From [the] strong came out sweet." But they were unable to explain the riddle for three days.