'Cannot' in the Bible

Therefore, the Lord says:I am now planning a disasteragainst this nation;you cannot free your necks from it.Then you will not walk so proudlybecause it will be an evil time.

You will eat but not be satisfied,for there will be hunger within you.What you acquire, you cannot save,and what you do save,I will give to the sword.

The [pagan] nations shall see [God’s omnipotence in delivering Israel] and be ashamedOf all their might [which cannot be compared to His].They shall put their hand on their mouth [in silent astonishment];Their ears shall be deaf.