A letter like P or D, where some part of the mouth is blocked off to make the sound, is called this simple word of cessation
a consonant sound such as 'l', 'd', 'n', or 't', made with the 
tongue touching the ... is one that you produce using both lips, for example the 
sound of 'm' or 'p' ... linguistics a front vowel is made in the front part of your mouth
... [DOC] [TLE] Print Glossary and Concepts (PDF) - Neuhaus Education Center [PAR] Accent  stress placed on a word or part of a word; the mouth opens wider, the ... 
Consonant  a set of speech sounds that are blocked or partially blocked by ... 
lips.