obstruent

• obstruction; substance which obstructs passage in the body (medicine); (linguistics) sound made by blocking the passage of air through the mouth, occlusive (e.g. sound of the letters b and p)
obstructing; blocking or hindering passage in the body (medicine); (linguistics) made by blocking the passage of air through the mouth, occlusive (e.g. of the sound of the letters b and p); disruptive; inhibiting