Meaning of the word harden in English

What does harden mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

harden

US /ˈhɑːr.dən/
UK /ˈhɑː.dən/
"harden" picture

Verb

1.

to become or make something rigid, firm, or solid

Example:
The concrete will harden within a few hours.
You can harden the clay by baking it in the oven.
2.

to make or become less sympathetic, kind, or vulnerable

Example:
Years of working in the prison had hardened his heart.
Public opinion began to harden against the protesters.