What is another word for plainclothes officer?
Pronunciation: [plˈe͡ɪŋklə͡ʊðz ˈɒfɪsə] (IPA) 
A plainclothes officer is a law enforcement officer who does not wear a uniform and blends into the crowd to investigate criminal activity. They are often called undercover officers or detectives. Other commonly used synonyms for a plainclothes officer include secret agent, plainclothes detective, covert operative, undercover detective, plainclothes policeman, and plainclothes investigator. These officers are highly trained and use various techniques to gather information and evidence, often posing as regular citizens or criminals to gain the trust of suspects. Their work is essential in fighting crime and protecting the public, but their success depends on their ability to remain inconspicuous and undetected.
