Chainsaw (noun)

A power-driven cutting tool that consists of a chain with cutting teeth attached to it, driven by a motor and used for cutting wood or other materials.

Origin:

The word is a portmanteau of 'chain' and 'saw', and the tool is a type of saw with a chain of teeth around a rotating sprocket wheel.

Examples:

1. He used a chainsaw to cut down the tree.
2. The chainsaw is a very dangerous tool if used improperly.
3. I need to sharpen the chain on my chainsaw before I can use it again.
4. The sound of the chainsaw filled the air as the workers cut down the trees.
5. She was able to cut the logs into smaller pieces with the help of her chainsaw.