Full of cracks or prone to cracking; having a brittle or fragile quality.
From 'crack' (a split or break in a surface) + '-y' (suffix forming adjectives meaning 'having the quality of'). This informal descriptive word emerged from the basic noun 'crack' with a diminutive or characteristic suffix.
Your grandmother was linguistically genius when she called aged leather or dried-out skin 'cracky'—it's the kind of practical, sensory adjective that survives in regional dialects because it perfectly captures how something looks and feels.
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