elemental

Example:The fundamental principles of chemistry are crucial for understanding more complex chemical reactions.

Definition:Essential or basic; underlying. Used especially of theories or structures.

Example:The primordial elements of the universe are still carefully studied by cosmologists.

Definition:Of, relating to, or constituting the very beginnings of something; primitive.

Example:The primary function of the heart is to pump blood throughout the body.

Definition:Most important or fundamental; basic; chief.

Example:The natural beauty of the landscape is simply breathtaking.

Definition:Existing in or derived from nature; not artificial or man-made. Often used in a positive sense, especially of things that are believed to be simple, pure, or beautiful in a natural way.