'Treachery' in the Bible

So Joram reined [his chariot] around and fled, and he said to Ahaziah, “Treachery and betrayal, Ahaziah!”

But the king of Assyria discovered a conspiracy in Hoshea, who sent messengers to So, king of Egypt, and offered no tribute to the king of Assyria, as he had done year by year; therefore the king of Assyria arrested him and bound him in prison.