anxious

An anxious person is feeling worried or uneasy about something that's happening or might happen in the future.

You know how sometimes you worry about things like your job interview or a big test? Or maybe you're waiting to hear back from someone, and it's making you feel jittery inside? That's basically what being anxious feels like. It's this nervous energy that can be hard to shake off. For example, if someone's got an exam coming up, they might start feeling anxious a few days before it's due, worrying about how they'll do or whether they've studied enough. Sometimes people use the word anxious to describe themselves when they're feeling stressed out or overwhelmed by something.