More crispy (adjective); a drawer in a refrigerator designed to keep vegetables and fruits fresh and crispy (noun).
From 'crisp' plus comparative suffix '-er.' As a noun, it's a modern appliance term (1920s) based on the adjective—a 'crisper' is literally something that makes things crisp.
Your fridge's crisper drawer is named after a word whose Latin root meant 'curled'—which is kind of poetic, because it preserves the delicate, crinkled texture of fresh lettuce.
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