The spelling of the word "MAPINA" can be explained using the International Phonetic Alphabet (IPA). The first sound is represented by /m/, which is a bilabial nasal consonant. The next sound is /ə/, which is a schwa vowel. The following two consonants are /p/ and /ɪ/, representing a voiceless bilabial plosive and a close front unrounded vowel respectively. The final sound is /n/, a voiced alveolar nasal consonant. Together, these sounds form the 6-letter word "MAPINA" with a unique phonetic representation.