—utilized for a perform term before a correct noun to differentiate the situation in the referent from the common, previous, or hypothetical ailmentWhile in the International Phonetic Alphabet, ⟨a⟩ is used for the open up front unrounded vowel, ⟨ä⟩ is utilized for the open central unrounded vowel, and ⟨ɑ⟩ is utilized for the open ba