gudgeon
noun
[ ˈɡʌdʒ(ə)n ]
• a small edible European freshwater fish, often used as bait by anglers.
• a credulous or easily fooled person.
Origin:
late Middle English: from Old French goujon, from Latin gobio(n- ), from gobius ‘goby’.
gudgeon
noun
• a pivot or spindle on which a bell or other object swings or rotates.
Origin:
Middle English: from Old French goujon, diminutive of gouge (see gouge).