Mountain (noun)

1. A large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill.
2. A large pile or quantity of something.

Origin:

Middle english, from old english mōnað, from latin mont-, mons mountain, hill, from mons, mont-, mountain, hill.

Examples:

1. Mount Everest is the highest mountain in the world.
2. The view from the top of the mountain was breathtaking.
3. He climbed the mountain with his family.
4. She loves to ski on the mountain.
5. A mountain of paperwork needs to be done.