The word "sizzed" is spelled with two "z" at the end, which is phonetically transcribed as [z̩d]. This means that the sound made by the word ends with a voiced alveolar fricative [z], followed by the sound of the voiced alveolar stop [d]. The double "z" indicates that there is a strong emphasis on the sound of the [z] in the word, creating a distinct sizzling noise. Overall, the spelling of "sizzed" accurately reflects the specific sounds produced in the word.