大胆

1. Origins, structure, and basic meaning

• Structure: The spelling is 大胆, read as だいたん. It is a noun and na-adjective for acting or expressing something boldly without being constrained by fear or convention.
• Basic usage: Modifying a bold use of color appears in 大胆な色使い, while changing a policy boldly appears in 大胆に方針を変える.

2. Common pitfalls and similar expressions

• Difference from 無謀
  • It can praise courageous decisiveness and does not necessarily imply reckless disregard for consequences.