noun
sincerity; faithfulness; wholehearted devotion
A somewhat formal or literary term for pure-hearted sincerity and unwavering loyalty. Often used in expressions of dedication or patriotic sentiment.
彼の丹心は誰もが認めるところだ。
Everyone acknowledges his sincere devotion.
丹心をもって国に尽くす。
Serve the country with wholehearted loyalty.