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—employed as being a purpose phrase ahead of an appropriate noun to differentiate the affliction on the referent from a common, previous, or hypothetical problemDuring the Intercontinental Phonetic Alphabet, ⟨a⟩ is utilized for the open entrance unrounded vowel, ⟨ä⟩ is useful for the open central unrounded vowel, and ⟨ɑ⟩ is employed