The term AIR COMBINING FORM is composed of three crossword solutions: SCHIZ (5 letters), OVO (3 letters), and MAL (3 letters). SCHIZ is derived from the Greek word schizein, meaning 'to split, ' and is used to describe a splitting or division of something. OVO is derived from the Latin word ovum, meaning 'EGG, ' and is used to describe something EGG-shaped. MAL is derived from the Latin word malus, meaning 'BAD, ' and is used to describe something that is BAD or of poor quality. Together, these three words form the term AIR COMBINING FORM, which is used to describe a type of air filter that combines two or more air filtration technologies.