He used exorcism to drive away the evil spirits.

He terrified people by using black magic.

My younger sister is learning equestrianism.

He entered the monastery to learn sacred arts.

He decided to apply euthanasia to his sick dog.

He is a famous philosopher.

He is immersed in the study of positivism.

He is majoring in moral philosophy at university.

His way of thinking is very philosophical.

He was troubled by the scholasticism.