Being unable to get enough air is read as feeling smothered — by duties, by closeness, by a situation that leaves you no room. Dream books take it as a call for space to breathe in the wider sense.
Has this come up in your dreams before? What was going on in your life then?
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.