支柱

1. Origins, structure, and basic meaning

• Structure: 支柱 (しちゅう) combines support 支 and pillar 柱 to denote a supporting post.
• Basic usage: It braces a leaning tree or holds up the center of a tent.

2. Common pitfalls and similar expressions

• Function as a support
  • A 支柱 is defined by the load or structure it stabilizes, not merely by having a vertical pillar shape.