To reassemble something is to put it back together again. When you break something, you might need to reassemble it so that it works properly again.
When there is a lot of something, it's called a swarm. A swarm can be a group of bees, mosquitoes, or other insects.
Overreact is to act in a way that is too extreme or too emotional. When you overreact, you act in a way that is not rational or reasonable.
To regain something is to get it back after it has been lost or stolen. When you regain your memory, you suddenly remember things that you had forgotten.
Alveoli are small sacks that are located in the lungs. They are responsible for taking in and exchanging air with the environment.
To distance yourself from someone is to move away from them. You can distance yourself emotionally, physically, or both.
When two people shake hands, they are usually trying to show their respect for each other. A handshake is usually just a simple way to say hello, congratulations, or goodbye.
A quarantine is a period of time during which people are not allowed to come into or leave a particular area. This is often done to prevent the spread of a disease.
A pandemic is a widespread epidemic. A pandemic can be caused by anything from a virus to a new kind of bacteria.