Translation

大胆な / 思い切った / 恐れを知らない

Meaning

Audacious means boldly daring, especially in a way that takes a noticeable risk. It can praise courage or criticize reckless nerve. The tone depends on whether the risk seems impressive or inappropriate.

Examples

• その小さな会社は大胆な国際展開を試みた。
  The small company made an audacious move into overseas markets.
• 彼女の大胆な計画は失敗しそうに見えたが成功した。
  Her audacious plan looked likely to fail, but it worked.