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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From crystal + -ize. The double l reflects the classical stem found in its etyma, Latin crystallus and Ancient Greek κρύσταλλος (krústallos), rather than the simplified spelling of the English base noun. Compare Hellenistic Greek κρυσταλλίζειν (krustallízein, “to shine like crystal”), post‐classical Latin crystallizare (“to change into crystal”), and French cristalliser.
crystallise, crystalise, crystalize
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Classic usage
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