A wave is traditionally read as a feeling that rises, peaks and breaks. Riding one with ease stands for going with an emotion instead of fighting it, while being knocked down by it points to something that arrived with more force than expected. A huge wave seen from the shore is one of the most common anxiety images, read as stress building on the horizon rather than anything that must happen. Calm, gentle waves are linked to a steady emotional rhythm. It can help to ask what feeling has been swelling in you lately.
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.