The word for today is…
crucible (noun):
1: a vessel of a very refractory material (such as porcelain) used for melting and calcining a substance that requires a high degree of heat
2: a severe test
3: a place or situation in which concentrated forces interact to cause or influence change or development
Source : Merriam -Webster
Etymology :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.
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