, open-rounded /ʃ/, /ʒ/, /tʃ/, /dʒ/ , and unrounded, in which vowels are sometimes called spread. These secondary articulations are not universal. For example, while French shares the English open-rounding of /ʃ/, /ʒ/ while Russian does not have rounding of its postalveolar fricatives ( /ʂ ʐ ɕ ʑ/ ). [1] Types