This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To make impure by adding extraneous, improper, or inferior ingredients.

adj. Spurious; adulterated.

adj. Adulterous.

adj. Tending to commit adultery.

adj. Corrupted; impure; adulterated.

v. To corrupt.

v. To spoil by adding impurities.

v. To defile by adultery.

v. To corrupt, debase, or make impure by an admixture of a foreign or a baser substance

verb-intransitive. To commit adultery.

adj. Tainted with adultery.

adj. Debased by the admixture of a foreign substance; adulterated; spurious.

To debase or deteriorate by an admixture of foreign or baser materials or elements: as, to adulterate food, drugs, or coins; adulterated doctrines.

To graft; give a hybrid character to.

To defile by adultery.

Synonyms To mix, degrade, corrupt, contaminate, vitiate, alloy, sophisticate.

To commit adultery.

Tainted with adultery: as, “the adulterate Hastings,”

Debased by foreign mixture; adulterated: as, “adulterate copper,” Swift, Miscellanies.

adj. mixed with impurities

v. corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones

"The word 'adulterate' means 'to make impure, spurious or inferior by adding extraneous or improper ingredients' and I guess this applies to learning new values and ideas as filling our heads with extraneous or improper ingredients as well."

impure   

purify   

adulterated    adulterates    adulterating   

adulterated    adulterating    adulteration    adulterant   

vitiate    debase    defile    contaminate    sophisticate