1. 忠实的：dust 灰尘 | duteous 忠实的 | duty 责任

2. 忠贞的：Dutchman's-breeches 兜状荷色牡丹 | duteous 忠贞的 | duteously 守本分地

3. 贞节的：dusty 满身尘埃 | duteous 贞节的 | duteous 忠贞的

4. 尽职的：righteous 正直的 | duteous 尽职的 | beauteous 美丽的

adj

1. willingly obedient out of a sense of duty and respect

e.g. a dutiful child
a dutiful citizen
Patient Griselda was a chaste and duteous wife

Synonym: dutiful