breathless

Short definition from Wiktionary

Adjective

1. 1
   Having difficulty breathing; gasping.
2. 2
   That makes one hold one's breath (with excitement etc.).
3. 3
   Not breathing; dead or apparently so.
4. 4
   Having no wind; still, calm or airless.
5. 5
   Having a somewhat hysterical tone, using over-emotive language.