おまわりさん
おまわりさん · omawarisan · JLPT N5 · noun
policeman
👮 o + mawari (going around) + san = the honorable Mr. Patrol
From 回る mawaru, to go around: the officer who makes the rounds of the neighborhood. Polite o- in front and -san behind turn it into a warm, respectful nickname, which is why it sounds friendlier than 警察官 keisatsukan.