
Hardening
Physical Transformation
Hardening implies a change from flexible to rigid, often in a literal, physical sense.

The hardening of wet clay creates a solid ceramic vase.
Irreversible Change
The process of hardening is generally one-way, meaning the material doesn't easily return to its original state.

Glass is formed through the hardening of melted sand.
Compare with
ConsolidateCureFortificationSolidificationStrengthenToughen
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