Resembling or containing chalk; having the white, crumbly, or dusty qualities of chalk.
From chalk (Old English 'cealc', from Latin 'calx' meaning lime) plus the adjective suffix -y (from Old English 'ig' meaning having the quality of). The -y suffix converts nouns into descriptive adjectives.
The -y suffix is one of English's hardest workers—'chalk' becomes 'chally,' 'sun' becomes 'sunny,' 'humor' becomes 'humorous'—it's how we turn things into qualities.
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