忠心 zhōngxīn good faith
good faith; devotion; loyalty; dedication
How to remember 忠心: 忠 loyalty + 心 heart = good faith.
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How it is used
- Wholehearted loyalty and devotion - 对公司忠心耿耿 (duì gōngsī zhōngxīn-gěnggěng) utterly devoted to the company.
- A noun for the loyal heart itself (一片忠心), whereas 忠诚 is more the quality/state of being loyal.
- Often 忠心耿耿 (steadfastly loyal); historically toward a ruler, now also employer/cause.