To be perturbed or agitated; to lose composure or be unsettled.
彼はどんな批判にも動じない人だ。
He is someone who doesn't get rattled by any criticism.
面接中に緊張して動じてしまった。
I got nervous during the interview and lost my composure.
大きな音がしても動じる様子はなかった。
Even when there was a loud noise, they showed no sign of being unsettled.