Etymology of the Greek word pneumatikos (πνευματικός, πνευματικῶς)
the Greek word pneumatikos, πνευματικός, πνευματικῶς (pertaining to breath; non-carnal; (humanly) ethereal (as opposed to gross), or (daemoniacally) a spirit (concretely), or (divinely) supernatural, regenerate, religious; non-physically; divinely, figuratively)
derived from the Greek word pneuma, πνεῦμα (a current of air; breath (blast) or a breeze; by analogy or figuratively, a spirit; (human) the rational soul, vital principle, mental disposition, etc., or (superhuman) an angel, demon, or (divine) God, Christ's spirit, the Holy Spirit)
derived from the Proto-Indo-European root *pneu-
derived from the Greek word pneo, πνέω (to breathe hard; breeze)