Refine (verb)

1. To make or become pure or free from impurities by removing unwanted material.
2. To improve or perfect by removing impurities or unwanted elements.

Origin:

From old french refinier, from latin refīnāre "make pure, refine", from re- "again" + fīnus "end, limit".

Examples:

1. The oil is refined to remove impurities.
2. He refined his writing style by removing unnecessary words.
3. The company refined its products to meet the new regulations.
4. She refined her cooking skills by experimenting with different ingredients.
5. The scientists refined their methods to make the experiment more accurate.