respiration
UK[ˌrɛspɪˈreɪʃən]US[ˌrɛspəˈreɪʃən]
n
The process of breathing; the act of taking in oxygen and releasing carbon dioxide.
n
A single complete act of breathing in and out.
n
(in biology) The process by which cells obtain energy from organic molecules, typically involving the intake of oxygen and the release of carbon dioxide.
Morpheme Breakdown
re
spir
ation
re
again
spir
breathe
ation
noun suffix
Etymology
The word respiration originates from the Latin verb respirare, meaning "to breathe again" or "to breathe back," itself formed from the prefix re- ("again") and spirare ("to breathe"). The root spirare is believed to derive from the Proto-Indo-European (s)peys-, meaning "to blow" or "to breathe," a root also giving rise to words like spirit and inspire. Over time, the literal sense of repeated breathing evolved into the modern scientific and medical term for the continuous, vital process of gas exchange. Thus, the word's logic captures the cyclical, repetitive nature of breathing, from its Latin components to its current abstract meaning encompassing both physiological and cellular processes.
Analysis
Structure: re (again) + spir (breathe) + ation (noun suffix)
- re: Latin origin, a prefix meaning "again" or "back."
- spir: Latin origin (from spirare, "to breathe"), the core root conveying the sense of breathing.
- ation: Latin-derived suffix (via Old French -ation), forming nouns indicating an action or process.
Examples
The patient's shallow respiration was a cause for concern.
Cellular respiration is essential for converting nutrients into usable energy.
The doctor monitored the child's respiration rate throughout the night.