Essence (noun)

1. The inherent nature or most important quality of something, especially something abstract.
2. The essential oil or fragrance obtained from plants, used for perfumes or flavorings.
3. The most fundamental or intrinsic aspect of something, especially something abstract or intangible.

Origin:

From old french essentia, meaning 'being, nature, or quality'.

Examples:

1. The essence of democracy is the idea that everyone has a voice and a vote.
2. The essence of roses is used to make many popular perfumes.
3. The essence of happiness is different for each person, but it often involves feeling fulfilled and content.
4. The essence of the religious experience is a sense of connection with something greater than oneself.
5. The essence of good communication is being able to listen and understand the other person.