An impurity is something that ruins the uncontaminated nature of something. If someone accuses you of impurity, they think you or your nature has been spoiled in some way by sin. When water is pure, the only thing in that water is water.

What is the root word of impurity?

impurity (n.)

1500, "fact or quality of being impure," from Latin impuritas "uncleanness" (in a moral sense), from impurus "not pure" (see impure).

What does the term impure mean?

: not pure: such as. a : containing something unclean : foul impure water. b : mixed or impregnated with an extraneous and usually unwanted substance an impure chemical. c : lewd, unchaste.