The word "previous" is a commonly misspelled word, with many people spelling it as "previou." The correct spelling is with the "s" in the middle. The IPA phonetic transcription for the word is /ˈpriːviəs/, with emphasis on the first syllable. The "i" in the second syllable is pronounced like "ee," and the final "ous" sounds like "us." Remembering the correct spelling of "previous" can prevent embarrassing mistakes in writing and communication.
There is no known word "previou" in the English language, so I am unable to provide an etymology for it. It is possible that it may be a misspelling or a variation of another word.