Loyalty is the quality of staying firm in your friendship or support for someone or something. 忠诚
noun [抽象名词] 忠诚,忠贞;忠于……的强烈情感
I have sworn an oath of loyalty to the monarchy. 我已经发誓效忠君主制。
I have sworn an oath of loyalty to the monarchy. 我已经发誓效忠君主制。