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.
Urtica dioica
In the German language, the idiom "sich in die Nesseln setzen", or to sit in nettles, means to get into trouble.
In Hungarian, the idiom "csalánba nem üt a mennykő" (no lightning strikes the nettle) means bad things never happen to bad people. The same idiom exists in the Serbian language неће гром у коприве. In Dutch, a "netelige situatie" means a predicament. In French, the idiom "faut pas pousser mémé dans les orties" (don't push grandma in the nettles) means that we should be careful not to abuse a situation. The name urticaria for hives comes from the Latin name of nettle ("Urtica", from urere, to burn).