hardened

American  

[hahr-dnd] / ˈhɑr dnd /

adjective

1. made or become hard or harder.

2. pitiless; unfeeling.

3. firmly established or unlikely to change; inveterate.

   a hardened criminal.

4. inured; toughened.

   a hardened trooper.

5. rigid; unyielding.

   a hardened attitude.

6. (of a missile base) equipped to launch missiles from underground silos.

7. (of a missile) capable of being launched from an underground silo.

---

hardened British  

/ ˈhɑːdənd /

adjective

1. rigidly set, as in a mode of behaviour

2. toughened, as by custom; seasoned

3. (of a nuclear missile site) constructed to withstand a nuclear attack

---

Other Word Forms

• semihardened adjective
• unhardened adjective
• well-hardened adjective

Etymology

Origin of hardened

Middle English word dating back to 1325–75; see origin at harden, -ed ²

Example Sentences

But parts of northern Thailand are seeing haze that even hardened locals say is exceptional.

From Barron's • Apr. 3, 2026

In mitigation, David Mason KC said the "hardened criminal" had "completely gone off the rails and got himself in a terrible, terrible situation".

From BBC • Mar. 26, 2026

Shredded cheese can also be whisked in or sprinkled immediately after the egg mixture hits the pan to create a slightly hardened top layer.

From Salon • Mar. 21, 2026

Over time, the mineral deposits hardened the fractured zones into ridges.

From Science Daily • Mar. 14, 2026

William Wise had set up a workbench for him and had finished the tool of hardened iron.

From "The Door in the Wall" by Marguerite de Angeli

Related Words

• seasoned