Etymology

dys- +‎ -pnea, from Latin dyspnoea, from δύσπνοια ‎(dúspnoia, “bad breathing”), compound of δυσ- ‎(dus-, “bad, unfortunate”) and πνοή ‎(pnoḗ, “breeze”).

Pronunciation

See full workup of the variants at Wikipedia > Shortness of breath > Collation of -pnea transcriptions.