Cowardice in a dream is read as fear winning out over action. Dream books treat it without judgement, as a sign of something you are not yet ready to face, and of the support you might need.
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.