Read Luke 9:45 Using Other Translations
But they understood not this saying, and it was hid from them, that they perceived it not: and they feared to ask him of that saying.
But they did not understand this saying, and it was concealed from them, so that they might not perceive it. And they were afraid to ask him about this saying.
But they didn’t know what he meant. Its significance was hidden from them, so they couldn’t understand it, and they were afraid to ask him about it.