gudgeon
Gudgeon (noun) means a small freshwater fish found across Europe and Asia.
Etymology
The noun is derived from Late Middle English gojoun [and other forms], from Old French gojon, goujon (“gudgeon”), from Late Latin gōbiōnem, the accusative of gōbiō, the augmentative of Latin gōbius (“gudgeon”), from Ancient Greek κωβῐός (kōbĭós, “fish of the gudgeon kind”), probably of Semitic origin. The English word is a doublet of goby and goujon. The verb is derived from the noun.