頑丈

1. Origins, structure, and basic meaning

• Structure: 頑丈 is read as がんじょう and can mean “sturdy” or “solid”, depending on context.
• Basic usage: The examples show a sturdy wooden box and solid shoes worn on rocky terrain.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It is a na-adjective for durable physical strength; use 頑丈だ predicatively and 頑丈な before a noun.