境界

A violent, rotating column of air extending from a thunderstorm to the ground, often visible as a funnel-shaped cloud. In Japanese, the name literally means 'rolling dragon,' describing its swirling appearance as it ascends to the sky.

A flood refers to an overflow of a large amount of water beyond its normal limits, especially over what is normally dry land. It is commonly used to describe natural disasters caused by heavy rain or overflowing rivers.

The process of a disease or feeling spreading from one person to another through contact or influence. It can refer to biological infections or the metaphorical spread of emotions like laughter or panic.

Infection refers to the process where viruses or bacteria enter the body and multiply. It is also used metaphorically for the spread of emotions, computer viruses, or habits.

An antibody is a protective protein produced by your immune system to fight off harmful substances like viruses or bacteria. It acts like a specialized soldier that remembers specific germs to prevent you from getting sick from the same thing twice.

Microscopic single-celled organisms that can be found everywhere, including inside the human body. While some cause diseases, many are beneficial for health and the environment.

A microscopic parasite that can infect living organisms and cause disease, or a malicious software program designed to damage computer systems. In Japanese, it is used identically for both biological and digital contexts.

An inspection, examination, or test conducted to check the condition, quality, or safety of something. It is widely used in medical settings for body checks and in industrial settings for product quality control.

A medical examination or consultation where a doctor checks a patient's body or symptoms to diagnose a condition. It refers to the specific act of a healthcare professional evaluating a person's health status.

The act of administering or prescribing medicine to a patient. It is a formal medical term used by healthcare professionals to describe the process of giving specific drugs as part of a treatment plan.