Sentence:  a <WSD>nasal</WSD> vowel 
Meaning of the word marked with <WSD> tags:  Having a sound imparted by means of the nose; and specifically, made by lowering the soft palate, in some cases with closure of the oral passage, the voice thus issuing (wholly or partially) through the nose, as in the consonants m, n, ng; characterized by resonance in the nasal passage