It is common in the Bible for people to "rise up," and it would be easy to pass over the phrase as simply describing a physical action. But in fact it represents an elevation in spiritual state, moving to a more internal frame of mind closer to the Lord. Often it has to do with understanding a new or important idea; we "rise up" to a state of greater perception and enlightenment. Obviously context is crucial to the exact meaning of the phrase in a given passage -- it matters greatly who it is that is rising up, and why.

5105. 'And there is no interpreter for it' means that no one knows what they hold within them. This is clear from the meaning of 'the interpretation' as the explanation of what something holds within it, dealt with above in 5093, and so of what those dreams held within them.