Resembling, flavored like, or characteristic of chestnuts; having the color, taste, or qualities of chestnuts.
From 'chestnut' (the tree and its nut, from Old French 'chastain') combined with the adjective suffix '-y,' creating a descriptive word for things that have chestnut-like qualities.
Words like 'chestnutty' show how English speakers can add '-y' to almost any noun to make an adjective—'chocolatey,' 'fruity,' 'nutty'—which gives us endless creative ways to describe flavors and textures.
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