spiro-, spir-, spira-, spirat-, -spire, -spiring, -spiration, -spirational

(Latin: breath of life, breath, breathing; mind; spirit, "soul"; courage)

Don't confuse this spiro-, with another spiro- meaning "coil, twisted".

transpire

Word units related to breath and breathe: hal-; pneo-; pneumato-; pneumo-; psych-.