obscure vowelEnglishOxford New American Dictionaryobscure vowel /əbˈskyo͝o(ə)r, , əbˈskjʊ(ə)r, äbˈskyo͝o(ə)r ˈvou(ə)l, ɑbˈskjʊ(ə)r ˈvaʊ(ə)l/ ▸ noun Phonetics another term for indeterminate vowel.