The term AIR (COMB. FORM) can be broken down into four crossword solutions: AERO (4 letters), AERI (4 letters), PNEUMAT (7 letters), and PNEUMATO (8 letters). AERO is a combining form meaning 'AIR' or 'ATMOSPHERE, ' while AERI is a combining form meaning 'of the AIR.' PNEUMAT is a combining form meaning 'AIR' or 'BREATH, ' and PNEUMATO is a combining form meaning 'of the AIR or BREATH.' All of these terms are derived from the Greek word for 'AIR, ' pneuma.