11. In a handful of Australian languages, it represents a " dental semivowel ". 12. Some languages add semivowels before or after the palatalized consonant ( offglides or onglides ). 13. The distinction between protruded and compressed holds for the semivowels and as well as labialization. 14. In diphthongs, a diaeresis was sometimes used over ? to indicate the semivowel y. 15. The latter text adds that final semivowels ( excluding r ) are also incompletely articulated. 16. The existence of semivowels in Bundjalung can be disputed, as in many Australian languages. 17. The semivowel occurs only in the diphthong. 18. Non-high semivowels also occur. 19. Semivowels form a subclass of approximants.20. The pharyngeal approximant is also equivalent to the semivowel articulation of the open back unrounded vowel.