* Cognition: The mental process of knowing, including awareness, perception, reasoning, and judgment.
* Cognizant: Having knowledge or awareness of something.
* Recognize: To identify someone or something from previous knowledge.
* Incognito: Concealing one's identity.
* Cognate: Having a common origin, especially in languages.
* Cognomen: A surname or family name.
There are many other words related to "cogn", often in combination with other Latin roots.