“忠心的”的英语可以翻译为：allegiant ...

皇家驱逐舰雇佣了很多忠心的雇员。The royal destroyer employs lots of loyal employees.你的忠心的赞助会得到充分的酬谢.You will be amply recomposed for your loyal support.英格兰是他忠心的藩属.England was his faithful tributary....