木炭

1. Origins, structure, and basic meaning

• Structure: 木炭 is read as もくたん and means “charcoal”.
• Basic usage: It refers to charcoal used for drawing and to partly used charcoal sticks counted in a box.

2. Common pitfalls and similar expressions

• 木炭で描く / 木炭が三本
  • Use 木炭で描く when it is the drawing medium and 木炭が三本 when counting sticks.