The spelling of the word "sidani" can be explained using the International Phonetic Alphabet (IPA). The first sound in "sidani" is /s/, which is a voiceless alveolar fricative. The next sound is /ɪ/, which is a short vowel sound, followed by /d/, a voiced alveolar stop. The next two sounds are /a/ and /n/, both of which are also short vowel sounds. Finally, the word ends with /i/, which is a long vowel sound. The IPA helps to accurately represent the sounds in spoken language and can aid in proper spelling of words.