It's funny, because I just realised that πνεύμα(pneuma)/spirit in Greek has the same root as πνεύμων(pneumon)/lung: the verb πνέω(pnéo), which means I breathe.
This is not Mr Portokalos talking from My Big Fat Greek Wedding, people: πνέω is traced to the older Indo-European stem pnew- , and the whole point of my comment is that there is a lot of heritage in language through the eons from older cultures and civilizations.
Trivia: the suffix -μα (like in the words pragma, dogma, trauma etc) generally means “the result or the carrier of the verb's actions”, so like pragma (“thing”, what is/has been made/done), dogma (what one believes in; the firmness of the belief is irrelevant to the ancient word), trauma (“wound”; the result of being wounded), pneuma would be what is being breathed; and there's another connection to old roots: alcohol is «οινόπνευμα» (spirit/fumes of the wine), and alcoholic drinks are called “spirits”.
Fun stuff :)