refine

To make additional improvements to something that is already developed.

To improve something all the time or very often.

To make significant improvements.

To improve something without stopping.

To make small improvements or adjustments.

To improve something repeatedly, often with interruptions.

To improve something slowly over a period of time.

To improve something more and more over time.

Describes something that has been developed or improved to a very high standard, or a substance that is very pure.

To carry on the process of improving something.

To make an effort to improve something.

To assist in the process of improving something.

To make an effort to improve something.

To process a raw material to change it into a different, more usable substance.