IPA: /ˈbrɛθləs/
KK: /ˈbrɛθləs/
Not able to breathe easily, often because of excitement or physical exertion; can also describe a situation that is very exciting or tense.
After running up the hill, I was completely breathless and needed to catch my breath.
Breathless → It is formed from "breath" (from Old English "bræð", meaning the act of breathing) and "-less" (meaning without). The word "breathless" means without breath, often used to describe a state of being out of breath or gasping for air.
Think of being 'without' ('-less') the ability to 'breathe' ('breath') — that's what breathless means.