right, such as [ʂ ʐ ʈ ɖ ɳ ɭ ɽ ɻ] . Alternatively, especially for those sounds with a relatively forward articulation (e.g. in the alveolar or postalveolar region rather than the hard palate ), they can be indicated with a retracted diacritic (underbar); this occurs especially for [s̱ ẕ] .