The spelling of the word "Peffley" can be explained using the International Phonetic Alphabet (IPA). The first sound of "Peffley" is /p/, a voiceless bilabial stop. The second sound is /ɛ/, an open-mid front unrounded vowel. The third and fourth sounds are both /f/, voiceless labiodental fricatives. The fifth sound is /l/, a voiced alveolar lateral approximant, and the final two sounds are /i/, a close front unrounded vowel. Therefore, the correct spelling of "Peffley" reflects these phonetic sounds: P - E - F - F - L - E - Y.