neutralise

Everyday

1. (science) To make an acid or alkali neutral by mixing them: an antacid neutralises stomach acid. tree →
2. To stop something from having an effect: neutralise the threat. tree →
3. (euphemism) To kill or destroy an enemy, in military language. tree →

In the lessons

In science lessons about acids and alkalis, neutralisation makes a salt and water; for example, baking soda neutralises a bee sting's acid (simple model). In sport and news, a team neutralises an opponent's attack. The military euphemism hides killing. Phrases: neutralise an acid, neutralise the threat.

Examples

• Toothpaste neutralises the acid in your mouth. tree →
• An antacid tablet neutralises stomach acid. tree →
• Lime is added to soil to neutralise acid. tree →
• The defender neutralised the striker's speed. tree →
• The report said the soldiers neutralised the target (a euphemism for killing). tree →
• We used indicator paper to see when the acid was neutralised. tree →
• The smell was neutralised with baking soda. tree →

Note

UK/Aus/NZ spelling: neutralise; US/Canada: neutralize. Noun: neutralisation. In chemistry: acid + alkali → salt + water; a neutral solution has pH 7.