Refiner

Part of speech: noun

Definitions

1. A person or machine that purifies raw materials by removing impurities
2. An agent or individual engaged in the process of making a substance pure or improved
3. Someone who processes and cleans materials like metals or oil to achieve higher quality

Etymology: Refiner is a straightforward formation: the verb "refine" with the agent suffix "-er," which means "one who does the action." The verb itself came into English in the Middle English period, borrowed from Old French "raffiner," meaning to make finer or purer, and the "re-" element was added there to intensify the sense of "fine." Its ultimate roots lie in the Latin "finis," meaning end or boundary, which gave the sense of "finished" or "perfected," so a refiner is literally one who brings something to its finished, purest state. The suffix has a longer pedigree than the verb. The "-er" ending descends from Latin "-arius," which denoted a person connected with a trade or occupation, and it passed into English through Old English "-ere" and Middle English "-er" and was then used productively to form names for doers of actions. That is why English can attach it to almost any verb to create a new agent noun, as it did here.

Synonyms: purifier, processor, filter, clarifier, distiller

Antonyms: pollutant, contaminant, impurity, adulterant, dirt