It appears in many English words related to knowledge, understanding, or perception, such as:
* Gnosis: A state of profound spiritual knowledge or insight.
* Agnostic: One who believes that the existence of God is unknown or unknowable.
* Diagnosis: The identification of the nature of a disease or problem.
* Prognosis: A forecast of the likely course of a disease or ailment.
* Cognition: The mental process of acquiring knowledge and understanding.
* Recognize: To identify someone or something as known.
* Ignorant: Lacking knowledge or information.
* Ignite: To set on fire; to cause to start burning. (This word, despite its literal meaning, comes from "ignis" meaning "fire," related to "ignorance" via the concept of "lack of light".)
Understanding the meaning of "gnos" can help you decipher the meanings of many English words and their nuances.