The word "tubar" is often misspelled as "tuba" due to the similarity in the pronunciation of the two words. However, the correct spelling of this word is "tubar" which is pronounced as /tuːˈbɑːr/ in the IPA phonetic transcription. The "r" at the end is pronounced differently than it would be in English and is rolled slightly. The word "tubar" is a Portuguese noun that refers to a tube or pipe used for conveying liquids or gases.