whoofing

Example:Gasping for breath after the run, he finally was able to whoof and exhale.

Definition:The act of trying to catch one's first breath after exertion, typically involving open mouthed breathing and an accompanying sound.

Example:She gave a small, whoofing gasp when she saw the unexpected sight.

Definition:To draw a sudden, quick breath, often involuntarily, especially as a sign of shock, surprise, or distress.