obligation
/ˌɑbləˈɡeɪʃən/
noun
- Something that you must do because of a law, rule, promise, or duty.
- She felt a moral obligation to help her friend.
- Citizens have an obligation to pay taxes.
- The contract creates a legal obligation for both parties.
- A feeling of being grateful or indebted to someone because of something they have done for you.
- I don't want to feel an obligation to return the favor.
- You are under no obligation to buy anything.
- He helped me out of a sense of obligation, not friendship.