Obstruent a. : Causing obstruction; blocking up; hindering; as, an obstruent medicine.

Obstruent n. : Anything that obstructs or closes a passage; esp., that which obstructs natural passages in the body; as, a medicine which acts as an obstruent.

Example:


Taxonomy
Obstruent, Obstruents, free encyclopedia, stricture, partial closure, vocal tract, friction, articulations, search, Airstreams, airflow, air pressure, classes, noise, component, The Sounds of the World's Languages, fricative, explosive.

Defination from the web:
obstruent is a consonant sound formed by obstructing airflow, causing increased air pressure in the vocal tract. In phonetics, articulation ... Obstruents are subdivided into stops (with total closure followed by an "explosive" release of air – hence the equivalent term plosive) ...