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'.

A central vowel is a vowel that is pronounced in the central part of the tongue.

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

In order to maintain health, it is important to eat until you are eight parts (out of ten) full.

I was able to understand his explanation more than enough.

His performance was more than wonderful.

He was ostracized by the village.

Centrifugal sugar is a type of sugar, characterized by its sweetness.