gasp
noun
°A short, sudden intake of breath.
"The audience gave a gasp of astonishment"
°(slang) A draw or drag on a cigarette (or gasper).
"I'm popping out for a gasp."
verb
°To draw in the breath suddenly, as if from a shock.
"The audience gasped as the magician disappeared"
°To breathe laboriously or convulsively.
"We were all gasping when we reached the summit"