The word "importuous" is not a commonly used term and it is spelled somewhat uniquely. The first syllable "im" is pronounced /ɪm/, while the second syllable "por" is pronounced /pɔː/. The final syllable "tuous" is pronounced /tjuːəs/. Overall, the word is pronounced /ɪmˈpɔːtjuːəs/. Despite its uncommon use, the phonetic transcription of "importuous" can help individuals better understand how to pronounce it if they come across it in their reading.