• rare earth metal

दुर्लभ:    blue moon curious inaccessible rare scarce

दुर्लभ मृदा:    rare earth दुर्लभ blue moon curious

मृदा:    earth permeability soil application

मृदा धातु:    earth metal मृदा earth permeability soil

धातु:    metallic element root word semen seminal fluid