The spelling of the word "nivison" is quite straightforward when we look at its phonetic transcription. According to the IPA, this word is pronounced as /ˈnɪvɪsən/. The letter "i" appears twice, indicating the short "i" sound which is often found in words like "hit" or "sit." The "v" and "s" sounds reinforce each other, making the word easy to pronounce. With this phonetic guide in mind, anyone can confidently spell and pronounce the word "nivison" correctly.