This word has a variant form of a morpheme.

He is proud to be heterosexual.

This word has an allophone under certain circumstances.

He respects the faith of pagans.

He was reincarnated in another world.

His idea seems to have come from a different dimension.

There is a strange atmosphere in this room.

He used his remarkable ability to help people.

He is an expert in ethology, and his research is highly regarded worldwide.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.