in an honest and direct way

She spoke very frankly about her experiences. 她非常坦率地讲述了自己的经历。

used when giving an honest and direct opinion, often one that might upset someone

Quite frankly, I think this whole situation is ridiculous. 相当坦率地讲，我认为这整个局面很可笑。

That's a frankly absurd suggestion. 坦率地讲，那个建议简直是荒唐。