작용하다

To break down food in the stomach. In a figurative sense, it means to fully understand information or to handle a heavy workload/schedule.

Something that causes a reaction or response in a living thing or a system. It can also mean encouragement or provocation that leads to action.

The process of putting things into groups according to their characteristics. This is a fundamental step in data analysis and organization.

The act of finding something that was previously unknown or hidden.

A person whose job is to conduct systematic study or investigation into materials and sources.

A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring. It consists of DNA sequences.

The degree of compactness of a substance. In social science, it often refers to population density—the number of people living in a specific area.

A system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.

The structure or process by which something works or is produced; a mechanism.

A response or action that occurs in return to a stimulus, event, or chemical substance.