verb
oblige
To help people by doing what they want or need.
The neighbor obliges by carrying the heavy groceries upstairs.

Etymology
The source verb means to bind or put under obligation. Doing people a favor makes them figuratively indebted, giving oblige its helpful-service sense.
In context
I speak to you in confidence; you will oblige me, I am sure, by not forgetting that?
More examples
- She asked for a song, and he obliged.
- They are obliging the visitors with a tour.
- I would be grateful if you could oblige.
Forms
oblige · obliges · obliged · obliging
obligation noun — a duty or requirement
Similar words
- help
- Broader than doing a particular requested favor.
- accommodate
- Adjusts to someone's wishes or needs.