Purify (verb)

1. To make something pure by removing impurities or contaminants.
2. To cleanse or purify something.

Origin:

From latin purificare, from purus ("pure") + facere ("to mak.e")

Examples:

1. The water was purified by passing it through a series of filters.
2. He was determined to purify his mind of negative thoughts.
3. The scientists are working to purify the protein so they can study it more closely.
4. They used heat to purify the metal.
5. The air purification system helped to purify the air in the room.