filter
noun
°A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.
°Electronics or software that separates unwanted signals (for example noise) from wanted signals or that attenuates selected frequencies.
verb
°To sort, sift, or isolate.
°To diffuse; to cause to be less concentrated or focused.
synonyms: filter out