His pronunciation is characterized by approximants.

In phonetics, a sibilant is used to represent a specific sound.

A glottal stop, or 'せいもんはれつおん' in Japanese, represents a sound like the 'uh-oh' in English.

The glottal stop plays an important role in linguistics.

Pharyngeal sounds are difficult to pronounce.

The African wild dog, also known as the Lycaon, is a very rare species.

He likes to study ancient pronunciations.

There is no message from him at all.

The theory of phonetic shift is an important part of linguistics.

He hid himself from the enemy using the art of occult hiding.