purifier (noun)

1. In the distant future, humans rely on advanced purifiers to cleanse polluted air on Earth.

2. The protagonist in the anime series uses a unique purifier to eliminate negative energy from their surroundings.

3. In their religious rituals, followers use a sacred purifier to cleanse their bodies and souls.

4. As a symbol of their love, the couple exchanged specially engraved purifiers to purify their bond and ensure a pure relationship.