levity

noun levity

• seriousness — of, showing, or characterized by deep thought.
• depression — A depression is a time when there is very little economic activity, which causes a lot of unemployment and poverty.
• sense — any of the faculties, as sight, hearing, smell, taste, or touch, by which humans and animals perceive stimuli originating from outside or inside the body: My sense of smell tells me that dinner is ready.
• gloom — total or partial darkness; dimness.
• gravity — the force of attraction by which terrestrial bodies tend to fall toward the center of the earth.