Meaning of 坦懐 in Japanese

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Definition of 坦懐

たんかい(tankai) 【坦懐】

きょしんたんかい(kyoshintankai) 【虚心坦懐】

(n) with an open and calm mind; with no preconceived notions; without reserve; frank; candid

He does not, in short, write with the candor of a man who is completely confident of his thesis.

虚心坦懐きょしんたんかいに話し合った。

We talked quite frankly.

虚心坦懐きょしんたんかいに申し上げるもうしあげる。今いまから言うことは、言葉どおりに受け取ってほしい。

I'm going to speak to you with utmost candor so I want you to take everything I'm about to say at face value.