a large opening in the ground or in the side of a hill
I came to a large cave.

천장
The ceiling is always the most difficult area to paint.

a shape that has a pointed top and sides that form a circle at the bottom
He finds a cone.

(for small drops) to fall
The rain water dripped from my hair.

the repetition of a sound that occurs when sound waves bounce off something
I heard the echo of my voice.

finally; at length
eventually, David will realize that he is special.

탐험하다, 연구하다
In this class we will explore new ways of learning about science.

a very small piece of something such as sand or salt, or a very small piece of anything
Hourglasses are timing devices that consist of grains of sand falling from one glass chamber to another.

to put things on top of each other to form a PILE
During the blizzard, the snow piled up on the house until the roof collapsed.