Daniel's understanding of the meaning of the vision is what alarmed him. This can be explicitly stated. Alternate translation: "did not say anything for a brief time because he was very worried about the meaning of the dream" (See: [[rc://en/ta/man/jit/figs-explicit]])
The abstract noun "interpretation" can be translated as a verb. See how you translated this in [Daniel 2:4](../02/04.md). Alternate translation: "will interpret the king's dream to him" or "will reveal what the king's dream means" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])