To become irritated or annoyed (to feel edgy or impatient because of small annoyances or delays).
電車が遅れていらついてきた。
The train is late and I'm getting irritated.
小さな音がずっと続くといらつくことがある。
A small noise that continues can sometimes make you irritated.
彼の無責任な返答にいらついた。
I got annoyed by his irresponsible reply.
長時間待たされていらついたので、深呼吸して気持ちを落ち着けた。
I got irritated after waiting a long time, so I took deep breaths to calm down.