oblige · verb /əˈblɑɪdʒ/
be obliged to do sth
B2 to be forced to do something
Dictionary example:
Sellers are not legally obliged to accept the highest offer.
Learner example:
Besides, I don't want to wear any protective head-gear, which all the riders are obliged to wear. (First Certificate in English; B2; Russian)
oblige
C1 I or T to be helpful
Dictionary example:
The manager was only too happy to oblige.
Learner example:
I understand that you attach a great deal of value to the views of your visitors. I am happy to oblige. (Certificate in Advanced English; C1; Dutch)
