Police Officer
Policeman, Cop
noun, の adjective
You know how 警察 is "police"? Well, this is kind of like that. This time you have someone from the government trying to warn you about the bad things you do. This person, like 警察 is a police officer. It's kind of informal, so you might also say this means cop.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
彼のお父さんは警官だよ。
His dad is a police officer.
昨日、警官に道を聞きました。
I asked a police officer for directions yesterday.
その警官の名前は、舌をかみそうな名前だった。
That police officer's name was like a tongue twister.