diagnosis
UK[ˌdaɪəɡˈnəʊsɪs]US[ˌdaɪəɡˈnoʊsɪs]
n
The act or process of identifying a disease, illness, or problem by examining someone or something.
n
A statement or conclusion that results from such an examination.
Morpheme Breakdown
dia
gnos
is
dia
through, apart
gnos
to know
is
noun suffix
Etymology
The word 'diagnosis' originates from the Greek 'diagignōskein', which literally means "to distinguish" or "to discern." This compound verb is built from 'dia-' (apart, through) and 'gignōskein' (to know, to learn). The core logic is one of knowing something thoroughly by separating it from other possibilities, akin to discerning the truth by looking through a situation. In ancient Greek medical contexts, this term was used for the critical act of distinguishing one disease from another based on observed symptoms. The modern English term, borrowed via Latin, retains this essential meaning of identifying the nature of a problem through systematic analysis and knowledge.
Analysis
Structure: dia (through, apart) + gnos (to know) + is (noun suffix)
dia: A prefix of Greek origin meaning "through," "across," or "apart."
gnos: A root of Greek origin (from gnō-) meaning "to know" or "to recognize."
is: A noun-forming suffix of Greek origin, often used to denote a state, condition, or action.
Examples
The doctor's diagnosis was confirmed by the laboratory tests.
Early diagnosis of the fault prevented a major system failure.
The book offers a sharp diagnosis of the country's political challenges.