Here are some synonyms for dutiful:
* Obliging
* Conscientious
* Devoted
* Faithful
* Respectful
* Loyal
* Responsible
Here are some examples of how "dutiful" can be used:
* "She was a dutiful daughter who always helped her parents around the house."
* "The dutiful employee always arrived on time and completed all of their tasks."
* "He felt a dutiful obligation to care for his elderly mother."
The word "dutiful" often implies a sense of selflessness and commitment to fulfilling one's obligations, even when they may be difficult or unpleasant.