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.

Pharyngeal sounds are difficult to pronounce.

The glottal stop plays an important role in linguistics.

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

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

There is no message from him at all.

He is interested in the Song pronunciation.

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