Verb

(refin)

To reduce to a fine, unmixed, or pure state; to free from impurities; to free from dross or alloy; to separate from extraneous matter; to purify

* {{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= Yesterday’s fuel , passage=The dawn of the oil age was fairly recent. Although the stuff was used to waterproof boats in the Middle East 6,000 years ago, extracting it in earnest began only in 1859 after an oil strike in Pennsylvania.

To purify from what is gross, coarse, vulgar, inelegant, low, and the like; to make elegant or excellent; to polish.

To become pure; to be cleared of feculent matter.

To improve in accuracy, delicacy, or excellence.

To affect nicety or subtlety in thought or language.

Verb

(contaminat)

To introduce impurities or foreign matter to.

Do not contaminate the peanut butter with the jelly.

This water is contaminated . It isn't safe to drink.

To soil or corrupt by contact; to tarnish; to pollute.

* Shakespeare

Shall we now / Contaminate our figures with base bribes?

* Goldsmith

I would neither have simplicity imposed upon, nor virtue contaminated .

* '>citation