willing
Ready and eager to do something without being forced.
Willing means ready and happy to do something, without needing to be forced or persuaded. When you're willing to help your friend carry their books, you're offering freely because you want to, not because someone made you. A willing volunteer raises their hand first, eager to participate.
The word captures an important quality: doing something with a positive, enthusiastic attitude. You might reluctantly agree to clean your room after being nagged ten times, but that's different from being a willing helper who pitches in when asked. A willing student tackles difficult problems without complaining. A willing teammate supports others even when it's hard work.
You'll often hear people ask, “Are you willing to...?” when they want to know if you'll agree to something challenging or unfamiliar. “Are you willing to try the advanced math class?” means more than “Can you do it?” It asks whether you'll embrace the challenge with an open mind.
The phrase willing and able combines readiness with capability: someone who is both eager to help and has the skills to do so. When teachers look for willing participants, they're seeking students who will engage enthusiastically, not just go through the motions.