a solid mineral material forming part of the surface of the earth and other similar planets

चट्टान

English Usage: The rock on the mountain is very hard.

Hindi Usage: पर्वत पर चट्टान बहुत कठोर है।

to protect from harm or danger

रक्षा करना

English Usage: The soldiers were sent to defend the country.

Hindi Usage: सैनिकों को देश की रक्षा करने के लिए भेजा गया।