The word "ISBDER" is an unfamiliar term that may baffle some people. Its IPA phonetic transcription can help clarify its spelling. The word's pronunciation is 'ɪz.bduːr', with the stress on the second syllable. This transcription implies that the word starts with the letter 'I', followed by an 'S', a 'B', a 'D', an 'E', and then an 'R.' Overall, the spelling of "ISBDER" appears fairly unusual and unfamiliar to native English speakers, as it doesn't follow any conventional pronunciation rules.