Soul (noun)

1. The spiritual or immaterial part of a human being or animal, regarded as immortal.
2. The essence or central part of something, especially of a person.
3. A person's emotional or moral nature.

Origin:

From old english sāwol, from proto-germanic *saiwalō, from proto-indo-european *saiw- ("vital breath"). the word was first used in the 9th century.

Examples:

1. He is a man of great soul.
2. The soul of the party.
3. The music touched my soul.
4. She has a beautiful soul.
5. The soul of the city is its people.