Category: A

A mixture of gases, mainly oxygen and nitrogen, which cannot be seen, but which exists all round us and which is breathed. The invisible, tasteless, odorless mixture of gases surrounding the Earth. Air at sea level consists of approx. 78% nitrogen and 21% oxygen by volume. The remaining constituents are water vapor, carbon dioxide, and…

An illness, though not generally a very serious one.  

A from a mental degeneration resulting from infection with HIV.  

Afraid of being in open spaces.  

A very severe physical or emotional pain.  

Referring to treatment which involves frequent high doses of medication. In medicine, rapidly developing or growing (e.g., a cancer). Hostile and unfriendly in the way one expresses oneself. Communicating one’s opinions and feelings in a way that may seem threatening or disrespectful to others.  

To make something worse.  

The physical changes which take place in a person as he or she grows older.  

All the people of a particular age or within a particular set of ages.