A system of writing using symbols or pictures, used in ancient Egypt. 

The method in which water is supplied to plants at regular intervals for agriculture.

The process of separating different parts or substances from a mixture. 

Absolutely necessary or very important. 

A particular kind of matter with uniform properties. 

Contrary to your interests or welfare; 

To bring or combine together ; to become one  

“n.” someone who suffers because of something bad that happens or  

because of an illness.   

“adj.” saying things that are the opposite of what you mean, in order to make an unkind joke or to show that you are annoyed.

“adj.” dealing with danger, pain, or difficult situations with courage and confidence.