The spelling of the word "BAGG" can be explained using IPA phonetic transcription. The /b/ sound at the beginning is a voiced bilabial plosive. The first /a/ vowel is pronounced as an open central unrounded vowel. The /ɡ/ sound represents a voiced velar plosive. Lastly, the final /ɡ/ sound represents another voiced velar plosive. Therefore, the proper way to spell the word "BAGG" is with the letters B-A-G-G using the phonetic symbols /bæɡɡ/.