Working together: Photo: lumaxartCo- is a common prefix found in many words. Co- comes from Latin and means together, with, joint, jointly (e.g. cooperate) or in association with (e.g. co-worker). So, verbs beginning with co- mean that something is done together. Nouns beginning with co- mean that someone or something is in association: that they are related.

An example is to cooperate. "Operate" means to do something or to perform a function. Add co- to operate and we get a word that means "to work or act together"—cooperate:

Example: The departments cooperated to finish the project.
Another way to say this is: The departments worked together to finish the project.

MindmapIt is nearly impossible to learn a new word like this:

legislation

alone. With no definition, context or relationships it is meaningless. You can make word maps to help you remember and understand new words better. This technique is to develop a thinking habit. If you do it enough, soon you will think in this way and your understanding and command of English will improve.

There are several ways you can arrange your word maps: