Eureka (word)
"Eureka" comes from the Ancient Greek word "heúrēka", meaning "I found (it)", which is the first person singular perfect indicative active of the verb "heuriskō" "I find". It is closely related to heuristic, which refers to experience-based techniques for problem solving, learning, and discovery.
Archena
The etymology of the word "Archena" is indisputably somehow related to the Indo-European root referring to "water" that appears in Arga, Erga, Arganzuela, etc., and, within the territory of Murcia, with the Argos river, Archena, Archivel, etc. The origin of the word "Archena" derives from Latin "arxila," which means clay, but over the years it turned into "Archena".