The word "convertaplane" is a combination of the words "convertible" and "airplane". It is pronounced /kənˈvəːtəpleɪn/ in IPA phonetic transcription. The first syllable, "con", is pronounced with the schwa sound /ə/. The second syllable, "vert", is pronounced with a short "e" sound /ɛ/. The third syllable, "a", is pronounced with a long "a" sound /eɪ/. Finally, "plane" is pronounced with a long "a" sound /pleɪn/. The word refers to an airplane that can be converted or transformed in some way into a different form or function.