The correct spelling of the word 'Harbourdues' is spelled with a /hɑːbəduːz/ in IPA phonetic transcription. It is a compound noun made up of two words, 'harbour' which means a place on the coast or on a river where ships can shelter, and 'dues' which refers to a charge or fee charged for the use of a particular service. Together, 'Harbourdues' refers to charges levied on ships for using harbour facilities. Spelling it correctly ensures clear communication and understanding.