often an alveolar , such as [t] or [d] ) but release as a fricative (such as [s] or [z] or occasionally into a fricative trill ) rather than directly into the following vowel. Manners of articulation Obstruent Stop Affricate Fricative Sibilant Sonorant Nasal Flaps/Tap Trill Approximant Liquid Vowel Semivowel Lateral