Harden | Mean of harden in English Dictionary

/ˈhɑɚdn̩/

• Verb
• to become hard or firm or to make (something) hard or firm
1. It will take several hours for the concrete to harden (into a solid block).
2. The gel hardens quickly.
3. The presence of certain substances in the blood can cause the arteries to harden.
4. These additives are designed to harden the steel.
5. substances that can harden the arteries
• to become more definite and strongly felt or to make (something) more definite and strongly felt
1. Opposition to the government has hardened as news of further scandals has leaked out.
2. The news has hardened opposition to the government.
• to make (someone) hard
1. He had been hardened by his years of military service.

• to begin to be or seem harsh, angry, serious, etc.
1. Her voice/manner hardened as she spoke of her determination to win.