(deyim) to rest for a moment after doing physical exercise and wait until you can breath regularly again. "She stopped to catch her breath at the top of the hill."
[ 'kach, 'kech ] (verb.) 13th century. Middle English cacchen, from Old North French cachier to hunt, from Vulgar Latin captiare, alteration of Latin captare to chase, frequentative of capere to take; more at HEAVE.