The spelling of the word "inned jail" may seem peculiar at first. However, it can be explained through the use of phonetic transcription. In IPA, "in" is pronounced as /ɪn/ and "ed" as /d/. Therefore, the word "in" and the word "ed" blend together to create the pronunciation of the word "inned." The word "jail" is simply spelled as it is pronounced with the IPA transcription being /dʒeɪl/. Thus, the correct spelling of the word is "inned jail."