expression, godan verb (-tsu)
be on edge; be irritated; be worked up
Describes a state where one's nerves are frayed or one is easily agitated. Often used when someone is tense, restless, or quick to anger.
彼は最近仕事のストレスで気が立っている。
He's been on edge lately because of work stress.
気
It's better not to talk to him when he's worked up.