* Concede: To admit something is true or valid.
* Concise: Short and to the point.
* Conclude: To bring something to an end.
* Confer: To discuss something with someone.
* Congenial: Pleasant and agreeable.
* Conjecture: To guess or speculate.
* Consecutive: Following one after the other.
The root "con" can have different meanings depending on the context. It can mean "with," "together," "against," or "completely."