忠心 (zhōng xīn) means “good faith; devotion; loyalty; dedication”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
这只狗对主人非常忠心。
Zhè zhī gǒu duì zhǔrén fēicháng zhōngxīn.
This dog is very loyal to its owner.
Updated: 2026-07-18