Clarify (verb)

1. Make (something) clear or easier to understand.
2. Make (a liquid) clear by heating it and removing solid matter that has been deposited on cooling.
3. Make (something) more precise or distinct.

Origin:

Late middle english: from latin clarificare, from clarus "clear" + -ficare (from facere "mak.e")

Examples:

1. Can you clarify what you mean by that?
2. He clarified his position on the issue.
3. The teacher tried to clarify the instructions.
4. The chef clarified the butter by heating it.
5. The company clarified their advertising policy.