He stuck out his tongue and licked the ice cream.

A front vowel is a vowel that is articulated with the front part of the tongue.

The front part of the car is heavily damaged.

Front vowels are pronounced using the front part of the tongue.

His English pronunciation is very natural.

He is practicing the pronunciation of Japanese.

A back vowel is a sound where the back of the tongue approaches the palate.

Back vowels are vowels that are pronounced using the back of the tongue.

A front vowel is a vowel that is articulated with the front part of the tongue.

The central vowels in Japanese are 'a', 'e', 'o'.