His posthistory was very interesting.

My father holds a residual stock.

We decided to start the game on the defensive.

We decided to start the game on the defensive.

He hit his occipital bone hard.

The Great Vowel Shift played a significant role in the history of English.

He is writing a thesis on the octovocalic theory.

A diphthong refers to the phenomenon where two vowels are pronounced consecutively within a single syllable.

By learning Pinyin, you can accurately understand the pronunciation of Chinese.

Velar sounds occur when the back of the tongue contacts the soft palate.