Where does “tachypnea” come from?

Tachypnea comes from the combining form tachy- meaning "fast," from Ancient Greek ταχύς meaning "swift," from Proto-Indo-European dʰengʰ- meaning "to press or constrain."

tachypnea (English): Alternative spelling of tachypnoea

Definitions

Alternative spelling of tachypnoea

Ancestry of “tachypnea”, step by step

Step	Language	Word	Meaning
1	English	-pnea	breathing, respiration
2	Ancient Greek	-πνοια	—
3	Ancient Greek	πνοή	breath
4	Ancient Greek	-ή	suffix of feminine nouns in the [[Appendix:Ancient Greek first declension
5	Ancient Greek	-ᾱ	nominal suffix
6	Proto-Indo-European	-éh₂	—

Every word from Proto-Indo-European -éh₂ →Every word from Ancient Greek -ή →Every word from Ancient Greek -ᾱ →