Episteme
"Episteme" is a philosophical term derived from the Ancient Greek word ἐπιστήμη "epistēmē", which can refer to knowledge, science or understanding, and which comes from the verb , meaning "to know, to understand, or to be acquainted with".
Epidemic
The term epidemic derives from a word form attributed to Homer's "Odyssey", which later took its medical meaning from the "," a treatise by Hippocrates. Before Hippocrates, "epidemios", "epidemeo", "epidamos", and other variants had meanings similar to the current definitions of "indigenous" or "endemic." Thucydides' description of the Plague of Athens is considered one of the earliest accounts of a disease epidemic. By the early 17th century, the terms endemic and epidemic referred to contrasting conditions of population-level disease, with the endemic condition at low rates of occurrence and the epidemic condition widespread.