A variant spelling or dialectal form of 'gargoyle' or a related architectural term for a waterspout or decorative feature on buildings.
Possibly a variant of 'gargoyle,' from Old French 'gargouille' meaning throat or waterspout, though the connection to this spelling is not entirely certain.
Medieval builders used gargoyles both as functional waterspouts and as creepy decorations—the theory that they scared away evil spirits probably made the workers feel better about adding those nightmarish faces to churches.
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