An auger bores deep in a steady spiral, read as getting to the bottom of a matter. Tradition sees it as determination to reach what lies beneath the surface.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.