maltha
/ˈmælθə/
noun
- A thick, sticky, black or dark brown mineral substance, similar to tar or asphalt, that occurs naturally or is produced from petroleum.
- The ancient road was paved with maltha, which made it waterproof and durable.
- Workers discovered a pool of maltha seeping from the ground near the oil field.
- In some regions, maltha was historically used as a sealant for boats and roofs.