The spelling of the word "NITICU" can be deciphered through the use of IPA (International Phonetic Alphabet) phonetic transcription. The word consists of five letters with the first sound being represented by the "n" consonant phoneme pronounced as /n/. The next sound in the word is the "i" vowel phoneme pronounced as /ɪ/. The third sound is the "t" consonant phoneme pronounced as /t/. The fourth sound is the "i" vowel phoneme pronounced as /ɪ/ again. The final sound in the word is the "cu" diphthong pronounced as /ku/.