godan verb (-ru), intransitive verb
stop; halt; pause; stand still
Describes stopping while walking or moving; often implies a sudden or momentary halt. Can be used literally or figuratively for pausing in an activity.
彼は急に立ち止まって、後ろを振り返った。
He suddenly stopped and looked back.
考え事をしながら歩いていたら、いつの間にか立ち止まっていた。
While walking and thinking, I found myself standing still without realizing it.