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

(-)

dirt; foul matter; that which soils or defiles

smut; that which sullies or defiles the moral character; corruption; pollution

* Tillotson

to purify the soul from the dross and filth of sensual delights

(British, pejorative, slang) the police

weeds growing on pasture land

Grampa remembers when he had to cut filth with a scythe.