In geology, the study of inversion tectonics plays an important role.

He is suffering from a disease of the macula.

He deeply reflected on his actions.

He was reflecting on his actions.

'Hot' and 'cold' are antonyms.

His criminal act was revealed by the police.

What is the antonym of 'hot'?

He is a believer in pantheism, considering all natural phenomena as part of God.

Using the handakuten, we derive the kana for a mora onsetted with.

Looking at the clouds floating in the sky, he began to dream.