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
同义词：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"
同义词：birch rod
