The word "MATR" is spelled using the International Phonetic Alphabet (IPA) as /mætr/. The first sound, /m/, represents a bilabial nasal consonant, produced by closing the lips and allowing air to pass through the nose. The second sound, /æ/, represents a short, front vowel pronounced with an open mouth. The final sound, /tr/, represents a consonant cluster containing an alveolar stop /t/ and an alveolar approximant /r/. Overall, the spelling of "MATR" accurately reflects the phonetic sounds used to pronounce it.