The correct spelling of the word "my inactive" is "my inactive," with the stress on the first syllable. In IPA phonetic transcription, it would be written as /maɪ ɪnˈæktɪv/. The first syllable, "my," is pronounced as the diphthong "ai" (/aɪ/), while the second syllable, "in," is pronounced with a short /ɪ/ vowel sound. The stress then falls on the third syllable, "ac," with the final syllable, "tive," pronounced with a long /ɪv/ sound.