帆柱

1. Origins, structure, and basic meaning

• Structure: The compound 帆柱 (ほばしら) joins sail with pillar and denotes a ship's mast.
• Basic usage: A sail is attached 帆柱に, and a mast damaged in a storm may be repaired in port.

2. Common pitfalls and similar expressions

• The mast supporting sails
  • It is the vertical structure supporting the sails, not the sailcloth itself.