A burrow stands for hiding, safety underground and turning inward. Digging one is read as the wish to withdraw; leaving one as stepping out into the open.
Where in your waking life have you met something like this lately?
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.