9 letters · 15 points in Scrabble
adjective of or relating to or using air (or a similar gas)
originFrom Latin pneumaticus, from Ancient Greek πνευματικός (pneumatikós, “relating to wind or air”), from πνεῦμα (pneûma, “wind, air, breath, spirit”), from πνέω (pnéō, “to blow, breath”).
Etymology from Wiktionary, CC BY-SA 3.0