n.

hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood

any betulaceous tree or shrub of the genus Betula having a thin peeling bark

同義詞：birch tree

a switch consisting of a twig or a bundle of twigs from a birch tree; used to hit people as punishment

"my father never spared the birch"

同義詞：birch rod

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