moral duty in Korean is 명분. For examples, you can use like [부모의 명분, 자녀의 명분]. In this post you will learn how to pronounce and use 명분 along with examples.
Basics
| Word | Part | Chinese | Sound | 
| 명분 | noun | 名分名分 | 명분 | 
명분 Meaning
| Meaning | Explanation | 
| moral duty; cause | A duty that a person is supposed to fulfill according to his/her social status or stance. | 


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