ADOPT v. 2 definitions
To take by choice into relationship, as, child, heir, friend, citizen, etc. ; esp. to take voluntarily (a child of other parents) to be in the place of, or as, one's own child.
ADULTERATE v.
To corrupt, debase, or make impure by an admixture of a foreign or a baser substance; as, to adulterate food, drink, drugs, coin, etc. The present war has . . . adulterated our tongue with strange words. Spectator.