鉄棒

1. Origins, structure, and basic meaning

• Structure: 鉄棒 (てつぼう) combines iron 鉄 and bar 棒 to name the horizontal bar used for exercise.
• Basic usage: 鉄棒で presents the bar as the setting for an action, whereas 鉄棒を marks it as the object being held or used.

2. Common pitfalls and similar expressions

• Location and object marking
  • Here the word denotes the gymnastic horizontal bar, not just any iron rod.