유해하다

Electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays. It is present in sunlight.

A change which is a result or consequence of an action or other cause; the power to produce a desired result.

To keep or maintain a certain state, relationship, or level without change. It is used in contexts ranging from health to international relations.

To recognize or become aware of something through the senses or the mind. In academic contexts, it often refers to cognitive processes.

To suppress, restrain, or hold back something, such as emotions, physical growth, inflation, or chemical reactions. It implies active control to prevent something from increasing.

To be weak or easily affected/damaged by something. Often used regarding security, health, or social standing.

An unintended, unpleasant, or harmful result of a drug, medical treatment, or even a policy or action.

A decline, lowering, or deterioration in level, quality, capability, or efficiency.

To spread or distribute something (like a disease, rumor, or culture) over a wide area or among many people.

The state of lacking something essential, such as nutrients, affection, or resources.