'Unfaithfully' in the Bible

"Son of man, when a land sins against me by {acting very unfaithfully}, then I will stretch out my hand against it, and I will break for it [the] {supply of food}, and I will send against it famine, and I will cut it off, [both] human and animal.

I will make the land desolate because they have acted unfaithfully.” This is the declaration of the Lord God.

And the nations will know that the house of Israel went into exile on account of their iniquity, because they dealt unfaithfully with Me. Therefore, I hid My face from them and handed them over to their enemies, so that they all fell by the sword.

They'll forget their shame and all of their unfaithfulness by which they behaved so unfaithfully toward me. They will live on their land in confidence, not in fear.