-pnea

Etymology
Representing, the common terminal element of the , , , , etc, from and.

Pronunciation

 * When the stress falls on the suffix,, that is, ; when the stress falls on the preceding combining form, the /i/ is unstressed (as the y in happy) and the p is usually expressed but sometimes silent; see the full workup of the variants at Wikipedia > Shortness of breath > Etymology and pronunciation.