A large stone or protective stone structure placed strategically to protect something from damage or intrusion.
From guard plus stone, a compound describing stones placed for protective purposes. Often used in maritime contexts (stones protecting harbor structures) or medieval fortification contexts.
Guardstones in harbors and at bridges show how people engineered protection before modern technology—they're effectively 'passive guardians,' doing their protective job silently for centuries.
Complete word intelligence in one call. Free tier — 50 lookups/day.