hard·​en·​er | \ ˈhärd-nər How to pronounce hardener (audio) , ˈhär-dᵊn-ər\

Definition of hardener

: one that hardens especially : a substance added (as to a paint or varnish) to harden the film

Examples of hardener in a Sentence

Recent Examples on the Web

According to the Mayo Clinic, this can happen after an injury, infection, or even as the result of using certain nail hardeners. Macaela Mackenzie, Allure, "This Woman's Toenails Fell Off After Getting a "Fish Pedicure"," 6 July 2018 Almost always comes with a tube of hardener; if not, see below. Ben Wojdyla, Popular Mechanics, "How to Fix Your Car's Dents and Dings," 21 Feb. 2018 For larger amounts of paint, purchase a paint hardener, like Homax 3535 3 Pack Waste-Away Paint Hardener ($5, amazon.com) at a home improvement store for just a few dollars. Lauren Smith, Good Housekeeping, "How to Dispose of Leftover Paint the Right Way," 17 Jan. 2018 This required us to mix two small vials of adhesive and hardener in the syringe before starting, which was simple. Mike Allen, Popular Mechanics, "How to Repair Your Cracked Windshield," 9 Jan. 2018 Battery materials such as cobalt and steel-hardener vanadium have surged, while minor precious metals like ruthenium rallied too. Thomas Biesheuvel, Bloomberg.com, "China Sends One of the West’s Most Critical Materials Soaring," 11 Sep. 2017 Because of that, the excavation required exposing parts of the fossil, little by little, and allowing it to fully dry before applying a hardener. Amy B Wang, chicagotribune.com, "These boys thought they'd found 'a big, fat rotten cow.' It was a 1 million-year-old fossil," 21 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hardener.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of hardener

1598, in the meaning defined above

Keep scrolling for more

Learn More about hardener

Statistics for hardener

Look-up Popularity

Time Traveler for hardener

The first known use of hardener was in 1598

See more words from the same year

More from Merriam-Webster on hardener

Rhyming Dictionary: Words that rhyme with hardener

Comments on hardener

What made you want to look up hardener? Please tell us where you read or heard it (including the quote, if possible).


food or victuals

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!