noun, na-adjective, noun which may take the genitive case particle 'no'
bold and unrestrained; daring and unfettered
Describes a person, action, or style that is audaciously free-spirited, often with a positive or admiring tone. Can be used as a noun, na-adjective, or no-adjective.
彼の大胆奔放な発想が新商品を生んだ。
His bold and unrestrained ideas gave birth to the new product.
その画家は大胆奔放な筆遣いで知られている。
The painter is known for his daring and unfettered brushwork.
A yojijukugo (four-character compound) combining 大胆 (bold, daring) and 奔放 (unrestrained, free). The exact origin is uncertain, but it follows a common pattern of pairing near-synonyms for emphasis.