Having the taste, texture, or appearance of butter; smooth and rich, or covered with butter.
From 'butter' plus the suffix '-y,' which creates adjectives meaning 'resembling' or 'full of.' Butter itself comes from Latin 'butyrum,' which came from Greek.
Interestingly, the word 'buttery' is used differently across English-speaking countries—in British universities, a 'buttery' is actually a food shop, keeping alive a centuries-old meaning of the word as a place where provisions are stored!
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