UPDATED: The root term [-gnos-] has origin in the Greek word [γνώση] (gn??si?) meaning "knowledge". Here are two terms that use this root in medical terminology:

- Diagnosis: the prefix [dia-] means "complete" or "total". The suffix [-(o)sis] means "condition" or "situation". The word means "a situation of complete knowledge", referring to the clear identification of a pathology that ails a patient.
- Prognosis: the prefix [-pro-] means "forward". The terms means "forward knowledge" and refers to the clinical pathway of a pathology and/or treatment.