He started hearing auditory hallucinations from stress.

The commoners were envious of the royal family's lifestyle.

He had hallucinations because of his illness.

I felt a deep disillusionment because of his actions.

It is important to calculate the subtrahend accurately.

This way of thinking limits our perspective.

He is trying to get a promotion by saying flattering words to his boss.

He is conducting research on natural phenomena.

The Eoarchean eon is the oldest era in the history of the Earth.

The Proterozoic eon is the longest era in the history of the Earth.