The spelling of the word "tenabl" is incorrect. A possible explanation for this error could be that the writer intended to use the word "tenable," which is pronounced as /ˈtɛnəbəl/ (ten-uh-buh l). The IPA phonetic transcription shows that the stress falls on the second syllable and the final -e is pronounced as a schwa sound. Spelling errors can often be corrected by proofreading and using spell-check tools, which can help ensure accurate communication in written language.