Well, this is not a hard word, man.
Q: What is ‘着急'?
A: It looks like a transitive verb, however, actually, it's an adjective.
It means to be hurried about something or someone.
The ordinary usage is give below in a dialogue:
e.g.
Tom: Hey, Jack, it's too late, I think you'd go home.
Jack: Don't be 着急, I don't think it's late enough for me to leave.
Tom: Is it okay? Maybe your parents would be 着急 about you.
Jack: Be cool. It's the weekend, shall we just finish our football game?
Tom: Well, if you're not 着急 and your parents are not 着急, maybe we'd play for another 30 minutes.
Jack: All right. I said it's okay, so you'd not be so much 着急 than I do.
Tom: Oh! I did a bad kick! Can you tell me how to make a nice goal?
Jack: Hmm, I think you need to aim percisely. Don't be 着急, take a breath first.
Tom: Hey! It works a little!
Jack: Just as I told you!
[End]