A person who is willing to do something agrees to do it. He or she is agreeable. This word looks like a verb, but it’s actually an adjective. Notice that the word "willing" is almost always followed by an infinitive. (What is an infinitive?)
Are you willing to work hard?
I’m willing to help you. (I’m happy to help you.)
We need to find someone who is willing to volunteer for something that’s really challenging.
Sarah says she’s willing and able to take on the challenge. (The words "willing" and "able" are often used together.)
Pedro said he was willing to do whatever he had to do in order to stay in the United States.
Vanessa said she was willing to marry Matt, but she wasn’t very enthusiastic about it.
What are you willing to do in order to be successful?
I’m sorry. I’m not willing to do that.
I’m not willing to make that kind of a sacrifice.
The word "willingly" is an adverb.
People who watch movies willingly suspend their belief in what’s real and what’s fake.
The man arrested would not go to jail willingly. He fought every inch of the way there.
He’s willing to deliver newspapers in order to make some extra money.