Scottish dialect adjective meaning lively, energetic, or having the qualities of a birch tree; sometimes used to describe something nimble or quick-moving.
From Scottish 'birk' (birch) plus the adjectival suffix '-y.' The connection between the flexible, quick-growing birch tree and the sense of liveliness is natural and descriptive.
This is a beautiful example of how plants inspire adjectives—the birch tree, which is flexible and fast-growing, becomes a word for being lively! It's like calling someone 'springy' because they move like springs.
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