It often implies a sense of joining, uniting, or shared action.
Here are some examples of how "con" is used in English words:
* Confer: To speak with someone, especially to discuss something formally.
* Conclude: To reach a decision or opinion after considering all the information.
* Convince: To persuade someone to believe something.
* Connect: To join together or link.
* Congregate: To gather together in a group.
While "con" usually carries a positive connotation, it can also be used in negative contexts, like in "con man" or "con game," which refer to deceitful practices.