taru-adjective, adverb taking the 'to' particle
openhearted; unaffected; free and easy
Describes a person who is frank, magnanimous, and unpretentious, with a big-hearted, carefree attitude. Often used in literary or formal contexts as a yojijukugo.
彼の磊々落々とした態度に、周囲の人々は好感を持った。
People around him liked his openhearted and unaffected attitude.
磊々落々と生きるのが彼の信条だ。
Living free and easy is his creed.
A shorter, more common synonym with the same meaning of openheartedness, but less emphatic than the reduplicated form.
A yojijukugo formed by reduplication of 磊落 (openhearted, magnanimous), which itself is of Chinese origin. The exact derivation is uncertain, but the characters suggest a sense of expansiveness and lack of constraint.