crucible

noun

cru·​ci·​ble ˈkrü-sə-bəl 

1

: a vessel of a very refractory (see refractory entry 1 sense 3) material (such as porcelain) used for melting and calcining a substance that requires a high degree of heat

2

: a severe test

He's ready to face the crucible of the Olympics.

3

: a place or situation in which concentrated forces interact to cause or influence change or development

… Mercury itself coalesced into a planet … from a swirling cloud of dust and gas, in the crucible of a high-pressure, high-temperature environment.

—Jacopo Prisco

… conditioned by having grown up within the crucible of Chinatown …

—Tom Wolfe

… the military's egalitarianism and common culture … in the crucible of combat.

—Gil Barndollar and Matthew C. Mai

Did you know?

Unless you’re studying Arthur Miller’s The Crucible in school, it may not be crucial to learn the story behind crucible, but it can’t hurt! Crucible looks like it should be closely related to the Latin combining form cruc- (“cross”); however, unlike crucial, it isn’t. It was forged instead from the Medieval Latin crucibulum, a noun for an earthen pot used to melt metals, and in English it first referred to a vessel made of a very heat-resistant material (such as porcelain) used for melting a substance that requires a high degree of heat. It’s possible that the resemblance between cruc- and crucible encouraged people to start using crucible to mean “a severe trial,” as that sense is synonymous with one meaning of cross, but the idea of simmering in a literal crucible also sounds plenty severe. The newest sense of crucible (“a situation in which great changes take place,” as in “forged in the crucible of war”) recalls the fire and heat required to transform some solids into liquids.

Synonyms of crucible

• ordeal
• fire
• gauntlet
• trial

Examples of crucible in a Sentence

He's ready to face the crucible of the Olympics.

His character was formed in the crucible of war.

Recent Examples on the Web

Far from being a mere flaw, hypocrisy is the crucible in which ideals and reality collide. —Shadi Hamid, Time, 3 Nov. 2025

In the years since, Bynum has become a leading voice among clinicians and researchers who argue that the intense crucible of medical training can amplify shame in future doctors. —Charlotte Huff, NPR, 28 Oct. 2025

The academy is a crucible for human formation, a place where minds and hearts are forged in the fire of inquiry, reflection, complexity and nuance. —MSNBC Newsweek, 22 Oct. 2025

And the crucible of what kind of waves this team leaves for its successors. —Brian Robin, Oc Register, 17 Oct. 2025

Word History

Etymology

Middle English corusible, from Medieval Latin crucibulum earthen pot for melting metals

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing crucible

• crucible steel

Rhymes for crucible

• deducible
• inducible
• producible
• reducible
• irreducible
• reproducible
• useable

Kids Definition

crucible

noun

cru·​ci·​ble ˈkrü-sə-bəl 

1

: a pot made of a substance not easily damaged by fire that is used for holding something to be treated under great heat

2

: a severe test

Medical Definition

crucible

noun

cru·​ci·​ble ˈkrü-sə-bəl 

: a vessel of a very refractory material (as porcelain) used for melting and calcining a substance that requires a high degree of heat