Neutralizer (noun)

A substance or agent that counteracts or eliminates the effects of another substance or agent.

Origin:

From the latin word neutralis, meaning 'having no particular bias or inclination'.

Examples:

1. The chemist used a neutralizer to counteract the effects of the highly acidic solution.
2. The doctor prescribed a neutralizer for the patient to take after eating too many spicy foods.
3. The odor neutralizer was sprayed throughout the room, leaving a fresh and pleasant scent in its wake.
4. The military used a neutralizer to safely dispose of the toxic chemicals in the abandoned factory.
5. The neutralizer was added to the pool to adjust the pH balance and make the water safe for swimming.