栃

1. Origins, structure, and basic meaning

• Structure: 栃, read とち, means a horse chestnut tree.
• Basic usage: It can refer to the tree or a board made from its wood.

2. Common pitfalls and similar expressions

• Tree and material
  • 校庭の栃 is the schoolyard tree.
  • 栃の板 is a board made from its wood.