IPA: /juːpˈniːə/
KK: /juːpˈniːə/
A term used to describe normal and effortless breathing.
After the exercise, she returned to a state of eupnea, breathing easily and comfortably.
Eupnea → It is formed from "eu-" (meaning good or well) and "pnea" (from Greek "pnein", meaning to breathe). The word "eupnea" refers to normal, good, or healthy breathing.
Think of 'good' ('eu-') breathing ('pnea') — that's what eupnea means.
No commonly confused words.