The spelling of the word "Sonnja" can be phonetically explained using the International Phonetic Alphabet (IPA) transcription. The first two sounds of the word "Sonnja" are /s/ and /ɔ/, pronounced as "s" and "auh" respectively. The remaining sounds are /nj/ and /ə/, pronounced as "nyuh" and "uh" respectively. The spelling of the word "Sonnja" may be unique, but by breaking it down phonetically, it reveals the distinct sounds that create its pronunciation.