fluoridise

/ˈflʊrɪdaɪz/
verb
  1. To add fluoride to something, especially to drinking water or toothpaste, in order to prevent tooth decay.
    • Many cities fluoridise their tap water to improve dental health.
    • Some countries choose not to fluoridise public water supplies due to health debates.
    • The dentist explained why it is important to fluoridise toothpaste for children.
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