The word "skul" is not a correct spelling in English, but it can be explained using IPA phonetic transcription. The correct spelling is "skull", with the phonetic transcription /skʌl/. The /sk/ sound at the beginning is a voiceless velar stop, represented by the letter "s" followed by the letter "k". The vowel sound in the middle is represented by the letter "u" and the schwa symbol /ə/. Lastly, the final consonant sound is a voiceless lateral fricative, represented by the letter "l".