Noun

(impurities)

The condition of being impure; because of contamination, pollution, adulteration or insufficient purification.

A component or additive that renders something else impure.

* {{quote-magazine, title=A better waterworks, date=2013-06-01, volume=407, issue=8838

, page=5 (Technology Quarterly), magazine=(The Economist) citation , passage=An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic the way real kidneys cleanse blood and eject impurities and surplus water as urine.}}

A state of immorality or sin; especially the weakness of the flesh: inchastity.

Noun

(countable, legal) Exemption from punishment.

(uncountable) Freedom from punishment or retribution; security from any reprisal or injurious consequences of an action, behaviour etc.

* 1846 , :

I must not only punish but punish with impunity . A wrong is undressed when retribution overtakes its redresser.

* 1994 , Nelson Mandela, Long Walk to Freedom , Abacus 2010, p. 495:

The remoteness of the prison made the authorities feel they could ignore us with impunity .