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cataclasm (n.)

"a breaking asunder, a violent disruption," 1829, from Latinized form of Greek kataklasm "breakage," from kata "down" (see cata-) +  klan,klaein "to break," which is perhaps from PIE *kla-, variant of root *kel- "to strike" (see holt), but more likely of uncertain origin [Beekes]. Related: Cataclastic, in geology, in reference to a structural character due to intense crushing, 1885.

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