The word "MAR INSCE" is a technical term in marine insurance that is commonly misspelled due to its complex pronunciation. The correct spelling of "MAR INSCE" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first syllable "MAR" is pronounced as /mɑːr/ with the emphasis on the vowel sound in "car". The second syllable "INSCE" is pronounced as /ɪnˈʃʊə/ with the emphasis on the second syllable and the sound of "sh" in "shoulder". Thus the correct spelling of this word is "MAR INSCE".