blahflowers

The short version is, they generally don't - the KJV is a useful stopping-off point for a lot of Fundamentalist Protestant groups, because it is in English, has the authenticity of age and is demonstrably not Catholic. So, you roll with the punches. In the specific case of the description of Mary as a parthenos, you say that clearly they meant Virgin, whatever the origin word was, because that is how the story is told in the Bible you are holding, and therefore this is how God wants his story to be told. Since it's in the Bible, it's the literal truth, because if it wasn't the literal truth God wouldn't let it be in the Bible.