pure

As I watched him I was irresistibly reminded of a pure-blooded well-trained foxhound as it dashes backwards and forwards through the covert, whining in its eagerness, until it comes across the lost scent.

Dorothy still wore the pretty silk dress she had put on in the palace, but now, to her surprise, she found it was no longer green, but pure white.

The air he inhaled was no longer pure, but thick and mephitic,—he was in prison.

You perceive that the resulting mixture has the appearance of pure water.