Her smile is very natural, and it feels comfortable.

In philosophy, natural law refers to the moral laws of the universe.

Our town suffered significant damage due to a natural disaster.

The equilibrium length of this spring is 5 centimeters.

He prefers natural foods.

His car spontaneously combusted all of a sudden.

This wood may spontaneously combust if the humidity is high.

Natural rights are rights that humans have from birth.

His eloquence has a great power of attraction.

He was working all day on the farm, using his labor.