He had to have surgery because his nasal septum was deviated.

An infix is a morpheme that is inserted inside a word.

He is majoring in Sinology.

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

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

He often behaves strangely because of his 'chuunibyou' (middle-school 2nd year syndrome).

He is showing behavior characterized by 'chuunibyou'.

He was born and raised in China proper.

He started exercises to strengthen his gluteus medius muscle.

The whimbrel is a bird often seen on the coast.