Relating to or resembling crustaceans, which are hard-shelled animals like crabs and lobsters.
From Latin 'crusta' (crust or hard shell) plus the suffix '-aceal' meaning resembling or relating to. The word evolved from describing the hard outer covering of sea creatures like lobsters and crabs.
The word itself mimics what it describes—it has a hard, crusty sound with those repeated 'cr' and 'st' clusters, making the pronunciation feel as tough as a crab's shell!
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